MKTRASHY  How is this product still on the market? It's been years since the switch from the old MacOS (when this was a really good piece of software) to OS X, and this buggy kluge crashes repeatedly. This company and these programmers have had a lot of time to get it right, but it is still floundering. How hard can it be to get it working properly? Do they not know what they're doing, or do they not care? This is what happens when a company buys a software product and doesn't support it with the necessary resources. Either fix it or get off the pot. Feature set is OK, but low marks for stability and obviously a poor value. Stay away from this till they put some heart back into it.  
(Version 10.5.2)

TEASPHAM  I originally bought Intego Personal Backup x4 which I found to be a solid program and then later updated to x5 about 3 months after x5 came out because I wanted the synchronisation functions.

I CANNOT recommend Personal Backup x5's synchronisation function. It is a horridly bug ridden program for synchronisation (which is a new feature of x5). For that, you should turn to ChronoSync.

Intego's technical support is also very horrible in responding to customer technical problems. They do not respond on time, if ever.

I was having a lot of errors when Personal Backup x5 was performing a synchronisation between two folders that exist on two different computers. The folders are 5GB in size and usually took over 45 minutes for the synchronisation to complete (and with errors) each time, not just the first sycn.

I finally gave up x5 hoping Intego would come out with a fix. They have not been responding to my requests for help nor have they been acknowledging that their program has bugs in it, if that is the case.

I've turned to the demo version of ChronoSync and the makes of ChronoSync have give me a time limited, unlimited data transfer serial number for the mean time to fully test out their program before I buy it. Using ChronoSync to perform the same function of syncrhonising the 5GB folders, the sync happens very quickly (in a matter of less than 4 minutes) and with no errors.

ChronoSync has not given me any errors. Intego's Backup constantly gives me errors and Intego's tech support seems to be indicating that it might be something I'm doing wrong. That is likely not the case since I have no problems with ChronoSync.

If you're considering a sycn or backup program, I recommend going to ChronoSync. It doesn't only do syncs, but backups too. ChronoSync will soon have the ability to create bootable backups too. Besides, ChronoSync is a cheaper software at $30.  
(Version 10.5.1)

KOBEGUY  I bought Backup X3 thinking it would be a solid and easy to use program - after all, how else could they justify the high price? In short, it never really worked well, with occassional crashes and a clumsy interface. In particular, the clone feature never worked. When X4 was released, I could see they cleaned up some of the mess and did a redesign. Great! and then I saw the "upgrade" price. Those of us who financed the work on the new version were rewarded with the prospect of paying big bucks for what we should have gotten the first time. I really feel ripped off. Save your cash for developers who give good value and treat their customers fairly. Deja Vu and Carbon Copy Cloner are great alternatives, work better, and cost a fraction of this program.   
(Version 10.4.5)

GPROVAN  I too had version X3 on my system set up for Auto Update, and I too had it replaced by version X4. Not a good way to go about things!

Generally this application has been ok. One problem I found was that some files were not synchronizing and I had to create the scripts all over again, or pick the source disk and destination disk again.

Another problem was that if I tried synchronizing a large amount of files, say 7Gb, the system baulked and took days to complete. If I set it to synchronize 3Gb it worked in minutes.

I think I'll be looking elsewhere as this has given me several areas of concern.  
(Version 10.4.4)

ANONYMOUS  My computer was set for automatic updates so it updated to X4. The previous version was removed (including my custom scripts) - now I can't use the software as it is asking for me to enter a serial number, but my X3 serial number doesn't work. Surely they shouldn't be allowed to do this - forcing users to buy an upgrade, even if they don't want one?

"we protect your world"

We f**K it up more like!  
(Version 10.4.2)

REIDOFLOCH  The high price for this upgrade is further increased by the application of the very high French VAT rate of 19.6% on all European purchases.

Perhaps Intego should consider using another European Country for downloading software - even the UK is only 17.5% VAT. This would reduce the cost in the EC.

After two days of use I have found it to be very buggy and doing horrible things with the memory. A lot of Disc full messages.

I have had to restart on several occasions but then discovered that if I relaunched the Finder this helped the memory to settle down.  
(Version 10.4.1)

ANONYMOUS  Wow! Personal Backup v4 upgrade license cost more than half of the price! Not a good way to reward people who paid their license for version 3.

Bad point for you Intego!  
(Version 10.4.1)

ANONYMOUS  Oh... what happened? This use to be absolutely THE best backup program for MacOS9. Simple beyond belief, incredibly efficient. Intego should take a long look at that last OS9 version, actually watch it run on a machine, and then try to duplicate that efficiency and smoothness.  
(Version 10.9)

JFM  I am pleased to update my comments (answer to Jonathan Dale's review, below): the problems which I had listed seem to have been solved by the most recent release. After my previous frustrating experiences, the latest attempt has been surprisingly pleasant: I could easily clone my HD (40 GO) in about 90 minutes, no problem at all.

In order to prevent problems, I would however strongly recommend to desactivate temporarily - during backup - the screensaver and other energy-saving settings, which seemed to be (partly) the cause for the breaks during backup/cloning.  
(Version 10.3.8.1)

ANONYMOUS  When an iSight is connected to my G4 the backup does stop after 2 MB and stalls.

Then unplugging the iSight the FW HD disappears and I get a device removal error. Starting the backup without the iSight, everything just works fine.  
(Version 10.3.8.1)