I installed it, and recommended it to my coworkers.

I think there should be a warning on the Berry-a-Code website, for T-mobile Pearl users. I have seen 3 different instances where installing it has either frozen the device or disabled the trackball. (resolved by using Desktop Manager's App Loader to remove the program)

Seems to work fine on Cing/at&t Pearls, 8300s and 8700s.

Again, I love the app...but T-mo Pearls beware! (until fix is released)