Being relatively new to the hobby (around 1.5 years), I found a VT Stealth heater for my 55 on the fly--there isn't much variety available here. I bought a second a few months later, so I've had them a year and a half, with absolutely no problems. The plastic casing is a big plus for me, as I shudder at the thought of glass breaking in the tank. I have some All-Glass heaters which came with tank kits; neither of them will go below 78 F even when turned all the way down. Otherwise, they're working fine after a year.
