Tried the free trial yesterday...
I have an 8900 running 5.0.0.348 and this app was really messing with my WiFi... big time. It would turn off and on randomly, even when I was sitting next to my router. On another forum several others reported the same issue with other BB models.. .so it was not just my specific 8900. It also locked up the 8900 at one point. I had to do a battery pull. When it was turning off and on I couldn't receive any push email nor could I send any email. Again, several others reported the same issue. When I uninstalled it, no problems, back to normal. So again, it had nothing to do with my specific devise.
While I think the idea is great, my personal feeling is that this app is not ready for prime time. It needs more battle testing and some additional controls to make it a real winner. It shouldn't be turning WiFi off and on while you are in the same location.. and that was with the Location Based option chosen. Oh... it was a real hassle when I was on the optoin that turned off WiFi when the screen turned off. It took several minutes for WiFi to turn on... but again, it would go off and on at will.
I didn't rate the app, but if I did I would have given it 1 - 2 stars.