We have 2 Hovabators and a Brinsea, and I really like them. Most especially the Hovabator 1588 (still getting used to the Brinsea).
As far as hatch rates, the best I've had in them are: 88% in the 1602, 100% quite a few times in the 1588, and 60% in the Brinsea (but that's also the only hatch I've completed in it and they were shipped eggs).