After I upgraded to 10.6 and iTunesSleep stopped working, I needed to find a new alarm clock. I tried just about every one out there, none of which worked the way I wanted, until I found Alarm Clock Pro. Even it had a couple of glitches, but after a couple of e-mails to the support team, both of my issues were fixed (within the week). Alarm Clock pro now works exactly the way I want my alarm clock to work, making it the only choice for me, and a very good, if paid, option.