Very Good - Great!
I bought Pzizz in 2006 for the Mac and have been using it ever since. I got the iPhone app as soon as it appeared in the App Store. I use it almost exclusively for afternoon naps and it works great. The quality of sound seems to have improved over the last year or two, as well. I can recommend Pzizz without reservation. I cant think of anything that would improve it.
TomJL about
Pzizz - Sleep, Nap, Focus