Light weight, durable, inconspicuous, easy to use.
Slightly off on temperature
This is an awesome little heater, I have it as a back-up to the main heater in my 95g tank. The only thing that isn't awesome about it is that it tends to get a little off in temperature. It says +- 1*F when really it is +- 2-3* F
All in all it's a great heater and I can't think of a better heater
I had one of these til it Exploded about 6 months ago. Called Marineland and they replaced it with the old model made of Glass. It was simple to use however when it blew up it Exploded and man it did go nicely. It killed 2 fish even though I had my tank on a GFI and have my tank on a Direct Ground probe to the Ground.