I have been a Mac user for 25 years (yes, I started with the very first edition), and I've been a believer in bootable clones for as long as there's been software to do it. I've tried Carbon Copy Cloner and I have used SuperDuper and pretty well all the cloning software. Nothing is as good as SPX.

Firstly, Qdea has the next version of its software ready almost immediately there's a new system or system update. This is crucial. Carbon Copy Cloner works until there's a system update and then it's useless until they get around to doing an update, which can take months and months. If you want to update your clone every week, as I do, CCC is of no use whatsoever. And the same comment can be made about most of the cloning software out there. SuperDuper is pretty good, but way, way slower than SPX.

Secondly, the tech support from Qdea is very quick and very helpful.

Yes, SPX costs more than the other cloners, but, in my view, if you're serious about having bootable clones always ready, the money is well worth spending.

I've had several occasions where my clones saved the day in a big way. On holiday in Europe, my MacBook Pro was stolen from the hotel room. On another occasion, a brand new MacBook Pro had a failure of the logic board. In both cases, my little back-up drive with the bootable clone was not touched. I found another Mac and was up and running in five minutes. No data loss at all (in particular my Aperture library).

In short, for real world serious use of bootable clones, you really can't beat SPX. And I should make clear that I have no other connection to Qdea than having been a very satisfied customer for years. A licence lasts for two years and I get any and all SPX updates and new versions during the two years after renewal. Then I keep using the latest version until Qdea comes out with another update or version, and I renew the licence to be able to take advantage of the software for another two years.