I've had two Via Aqua heaters in my 260g for 15 months. The tank is in a basement, so the temps down here are cooler. They are very consistent heaters and I love them so far. I really like how the temp. control is on the power cord so it's outside of the tank. Also, after 15 months, the suction cups are still going strong (actually, the suction cups holding the heater are still going strong, but the ones holding the temp. probe don't stick anymore). From my experience, I highly recommend them.