I know a few of you have them...i love the idea and look but alot of threads say they have problems with the wet sides or it falls off. It's a very expensive powerhead....what do you guys think? I can get one used but new for $330 shipped to me.....so i do get a warrenty but still. Also do you guys have the batery back up? Anyone know if a third generagtion is on its way out any time soon.