HAKKA  I like this little tool. Got it through promotion so paid only fraction of price.

I wish to see more logic flow oriented interface in future. But even in current design it very helpful tool that anybody can use to achive best performance of your Mac!   
(Version 2.1.1)

MAC5  Plenty of other apps that do the same job at no cost.

Like so many other comments, why pay $20.00 simply because you can access it from a pull down menu. Onyx and a few other do the same thing without the menu for free.

Save yourself $20.00..  
(Version 2.1.1)

DSPENCER3491  You're basically just paying $20 for convenience. Because you only really need to repair disk permissions and clear cache every month or so it makes morse sense to get a free program like onyx - we're not running Windows here   
(Version 2.0.6)

GBBOB  The only good thing that separates main menu from all the rest is instant access by the menu. No booting, looking for it if you do not keep in the dock or tool bar. The only thing I do not like is that some schmuck is getting the money and accolades from those that don't he is not the one who wrote the app and has the nerve to charge $20 for work he did not do. 99% of the program is not his script and cannot claim to. Yes he has made some minor tweaks but nothing revolutionary to it. I am just sorry that the original programmer was somehow talked out of selling what is an excellent utility. Luckily there are ways on the web to keep main menu free like it should be. This guy does not deserve a dime for someone else's work. End of Line...  
(Version 2.0.6)

JOSHK  Still overpriced, still no new features, but at least Chinese speakers can get grifted like everyone else.

Loving onyx and haven't looked back.   
(Version 2.0.6)

CYBERSLEUTH58  AWESOME maintenance tool. Allows you to keep an eye on everything PLUS the kitchen sink... I love its many great features as well as the interface that gives you access to all of the tasks it allows you to do. Keeps my Mac up and running and helps me to keep the garbage down to a minimum, too. My absolute favorite is its easy access to force quit. There are times when one of my apps hangs... Or my internet browser is just too slow. It can take forever to force quit using the keyboard command. Force quitting from the dock isn't always that successful, either! When you force quit through MainMenu the app quits instantly. System cleanup is painless as it can shut down after it does its thing if you set it up that way. Very easy even for a novice.   
(Version 2.0.5)

JAZZYGUY  "Sadly, there is nothing of value over the free version. Particularly there is absolutely nothing worth a $20 increase in price when far better software is available for less." I agree whole heartedly!  
(Version 2.0.5)

JUSTANTHRGUYHERE  I have to agree with the other comments that the nagging to register is too much! If you're going to give me a trial for XX number of days then let it be a trial for XX days and don't nag me to register all day long during that XX days. While it sounds as if it's a cool app, there are others available, some free, that so what this does, sometimes less, sometimes more, but I can't evaluate its worth to buy if it's going to constantly interrupt my work. I deleted it after two days!  
(Version 2.0.4)

ZOGHABI  A great app with good features and facilities. In addition, I am satisfied with the developer fast response and support.  
(Version 2.0.4)

FANCHEE  I picked this up for free from MU (thank you!) and was skeptical about its usefulness. I've been using it for a couple of weeks now and what I've found is I really like it. I was using Macaroni before, which I really loved but it hasn't been updated in a very long time. So I gave this one a try.

What I like is it doesn't take a lot of system resources (7.7mb as I write this.) It's easy to configure and I really like the batch tasks and the control you have over what runs.

Maybe it's just me, but this seems very fast in comparison to Macaroni (which seemed to take minutes to do the same tasks.) I'm a big growl fan so of course that's a plus for me!

I would recommend this app.  
(Version 2.0.4)