JACOBUS77  I have used Onyx with Jaguar, Panther and Tiger. (Haven't seen a burning need to get Leopard.) I have found it to be well-planned and highly valuable. I believe the majority here value it too. Those who find fault with it, I swear would find fault with someone handing them a silver dollar. It works great and it's free.

Esthetics: I LIKE the brushed-metal-with-Aqua-accents. Maybe because I like OSX and its Aqua interface?

Interface: Straightforward and useable, IMHO. There are improvements that could be made, as there are to any software. And nothing the writer does can possibly please everybody.

Functionality: Gives excellent command over more of the system than any other utility I can think of. I've found the defaults to be quite safe on all the Macs I've tested it on. I did have a merry dance fixing one after I checked one too many boxes, but that was my fault, not Onyx. Permissions repair seems better booting from the system DVD, but Onyx does almost every OSX-Unix maintenance routine you can do from a hard drive session. And that is a lot.  
(Version 2.0.5b2)

AYMEN  Best utility app ever. I tried other applications but there weren't as easy and efficient as Onyx. Consider a donation to the developer, he deserves is !

- Aymen  
(Version 2.0.5b2)

JAZZICA  Joel Barriere is a wonderfully talented developer and an obviously very giving person. If we think of all the times his app has saved us from trouble, we might be inclined to send a few dollars via paypal to support his efforts. He really is something special ... I've used all iterations of Onyx over a period of many years, and only a few times did a "hiccup" occur - never a disaster. Keeping up with every path change and OS update, plus doing it all in a tongue not native to him... that's moxie, and that's real talent. A 5-star app from a 10-star developer. Word up, Joel!  
(Version 2.0.5b1)

TITANIUM1  Hello,

Link corrected... Sorry and thanks for the admin!!  
(Version 2.0.5b1)

SGGINC  Download link bad ... Thanks ... Ken  
(Version 2.0.5b1)

STILL_SPARKLING  Great app. I hope it's ready to go when Snow Leopard hits. I tried iTweax and while it does perform many of the same functions, it's still quite buggy so I'm back to Onyx.  
(Version 2.0.5b1)

ILUV  App is great, but plenty of options is unknown to simple user and it will be great if developers include short tips for each point of advanced menu options (ex. this option may damage your system if used without another option being selected).  
(Version 2.0.4)

FORMICA  I was just writing a MacUpdate.com review of iTweax, and since it's so much like OnyX, my review couldn't help but compare them. So, I surfed over to VersionTracker to see how many versions of OnyX there have been since its inception, and would you believe there's been at least 102 since June 2003? Now that's dedication to your craft !

I kind of like iTweax because it does many of the same things that OnyX does, but in a much lighter-weight program. But even though iTweax is just at the beginning of its development, there have already been some serious issues that made me thank my lucky stars for Joel and OnyX.

Nevertheless, I'm sure iTweax will improve over time (remember how long it took Joel to get the English translations right?). However, I could never abandon such a skillfully designed and long-tested old warhorse as OnyX (which has taken such good care of my Macs over the years) for some slim, nubile and flashy young startup like iTweax. Come to think of it, I guess I feel pretty much the same way about my wife.

Anyway, Kudos to Joel Barriere for working so long and hard to make the best app in its class, and then continuing to give it away for free (unlike C()cktail, Yasu, Leopard Cache Cleaner, etc., etc.) !!  
(Version 2.0.4)

MACGURL  Excellent upgrade. All tasks are smooth as silk. I think they need you at Apple, Joel, considering their last few "updates". It's amazing to see a free app from a devoted developer, still keeping up with the coding idiosyncracies of a mega-corporation that seems rudderless at the moment.

Seeing as how they just broke "repair permissions" with their last iTunes/Front Row update and are now faced with releasing a NEW update to update their last update, and taking note of the fact that many recent updates have created new bugs not previously in existence, talent like yours is sorely needed in Cupertino.

You have my respect and my thanks.  
(Version 2.0.4)

MAHOJAS  Amongst all the applications of its kind out there I feel it has the most systematic interface and provides the most ease of use. It is a disk utility program par excellence. For me, I just perform the automated actions routine every once in a while, and I have never had any serious problem in all the 5 years I have used this program. All those who have rated this application negatively here I understand to be either newbie hotties who still must learn to follow instructions or those whose negativities originate from elsewhere and they just need to let off steam. Kudos for Onyx.  
(Version 2.0.4)