The 1.8.2 release works great for me!

I just bought the app after 1.8.2 was released, so I cant speak to previous versions, but it has been running flawlessly on my old iPhone 3G running iOS4 for a few days now. I really like the customization available (I prefer the red LED look). Ive tried several alarm clock apps and so far this one is my favorite.

Eric Asberry about Awaken