personally, i don't see any poor performance issues on my htc8s, no matter if i have 100 or 500mb free.
btw.do you guys prefer shrink storage or storage cleaner?
first, i've been using shrink storage, but it bothered me to always restart the phone, so i ended up with storage cleaner and I am pretty happy with that. It serves well for the purpose, no need to restart.great app.