Electronic Dog Door Recommendation

I'm hoping that some of you could provide a recomendation for an electronic dog door. This would be for a large dog. I'm mainly interested in the flap style with the infra-red or magnet style latching system. The Staywell seems pretty popular, though I've read some negative stuff about it, mainly about it's poor latching mechanism.  Can any of you share some experiences/make a recommendation for a good one? Budget is around $200 or so. I could be a bit flexible on it.

Thank you!