Not bad

+1 Its pretty good and easy to use
+1 The price is right
+1 You can change the sounds
-1 There is no option to select some of the default system sounds (basso, blow, bottle, frog, etc)
-1 If you choose the preference "mut all sounds" the option to "keep growling" also disappears
-1 Effectively that means there isnt an option to ONLY notify via Growl / Visually and without sounds
-1 The timer will close if you press cmd+w. I would like to see an option to protect the timer from closing / just make cmd+w hide the timer, or at least a confirmation "are you sure you want to close this active timer?"

cwdd about Howler Pro