JCAT  I got this by accident as part of a MacBundle containing two other apps I needed, but I have used it thankfully every morning since. I have an odd schedule; Aurora lets me set a different wake-up time for each day, and a separate playlist so that before my eyes open I know what day this is. Marvelous! It doesn't help my computer run better nor my workflow lessen, but it certainly improves my mood! No alarms, no depressing news, no extra-loud radio ads--just music of my choice.  
(Version 4.0.10)

BRITONIUS  Aurora is nice as far as alarm clocks go, but Awaken I believe has a nicer interface and better functionality and is much cheaper at $12.95. Aurora does have Awaken beat at present with its' EyeTV integration, otherwise they are comparable in functionality. Awaken also just announced that it's 4.1 release will allow us to choose whether you want to let iTunes play the music or Awaken. Both have benefits. Plus it will allow video playback within the alarm window. Plus I get quicker response from Awaken's devs. Check it out and compare to decide which app is best for your need. Here is a link to the blog talking about new features coming in Awaken 4.1 - http://embraceware.com/blog/2008/02/24/awaken-41-look-ma-no-itunes-and-look-at-the-moving-pictures/#comment-2314  
(Version 4.0.8)

GAOSHAN  This app was good when it was free. Since it now costs it has to face off against other for-pay applications like it. Given that, Awaken is about half the price and better (better looking, easier to set up, cheaper, etc.).  
(Version 4.0.5)

BILLIFER  I've been using Aurora for quite some time as my one and only alarm clock. It functions perfectly and I've been completely satisfied with it. When the new version (4.0) came out a few days ago, I didn't even notice that it had changed from freeware to shareware/demo. (It certainly wasn't listed in the "What's New" section!) As I said, I think Aurora is a great app, and it's worth paying for. The snooze feature and multiple alarms to perform essentially any task I wish through scripting is fantastic.

But in the whole time I've been using it, I've never "shopped around" for a better one. Now that it's $22.00, well, I'm going to have to reevaluate my options before I decide to buy. The price tag just may have lost a potentially very happy customer for Aurora -- not that I mind paying for it, but that I think $15 or less would be a more appropriate price -- especially considering its long history as freeware.  
(Version 4.0)

BUMBLEB  A good application. I've used it a few times when it was free. The new pricing seems a bit on the high side.  
(Version 4.0)

RORO01  WHY PAY?

Alarm Clock is the best alarm clock application and it is free. The only problem - it is not compatible with Leopard, yet.  
(Version 4.0)

BALTHAMOS  Great application; works how I want it to. And if you want to use this application, but still have your computer lock when it sleeps, then I suggest using a utility like Utility Lock. Works quite well in conjunction with Aurora. Keep up the good work dev! Would like to see the standard OS X lock from sleep supported (jiggler, perhaps?).  
(Version 3.3.4)

JB4  Help.

Since the iTunes update, the last two days, I've woken up to the "Westminster Chimes" blaring at full volume,

Can't take much more. ;>)  
(Version 3.3.3)

HODIEBUD  this program is amazing... it does just what it says it does... i wish more programs were like this!  
(Version 3.3.3)

NONTROPPO  Excellent user interface and the perfect blend of necessary features.

I've had no reliability issues. I send my Macbook (10.4.9) to sleep (Aurora can play you songs for a set time before sleeping) and it always wakes up at the right time.  
(Version 3.3.2)