I am leary of autofeeders. I do not have too much expereince with them however. It is always best to try and get a trusted friend or pay a LFS
to stop by every couple of days to not only feed the tank, but to do top-offs and make sure everything is okay. I am comfortable leaving my tank unattended for 2-3days. Anything past that and my tanks need top-offs and feedings. If you do get a friend or neighbor to stop by it is always a good idea to let the LFS
know someone else is watching your tanks and that they may get a call for help shoud it be needed. My LFS
is glad to be "on call" if needed.