Are you sure that was the 300 watt and not the 200 watt. Either way an excellent deal. That fish place will price match if you can find another deal like that. At that price I'd take two, just to have a spare! I don't know if a spare is really needed though, I've been using these for years and never had a problem, super reliable.
Had it for 2 years and have yet to use it.
I just moved from Phoenix, but in Phoenix, the need is not all that great.
I set up when it was warm, was going to set it up during the winter, but it never got to needing it, so I just didn't do it.
I am setting it up on all my tanks as they go back up after the move. I am not using ANY in tank heaters at all, too much clutter
I have many friends that use them exclusively, and know they love them, I have spent a bunch of time with them and their tanks, so I feel like I have used them and know the value already.