We've had the extreme for over a year now & like it. I do wish there was a way to not have to reset everything when you change the batteries & I wish you could override it, to say keep the door closed for an entire day, without clearing whats already programmed.
But the door functions great, never fails to do its thing. I like how adjustable the closing at night is, to either adjust the light sensor for how dark it is, or add on minutes. We had to add on a few minutes because they would sometimes miss the door. Works great.