I have a H2 and like the simpleness of it. Everything is in the back, which makes it easy to get to. I like the grate system that blows air under the wood. Ashes fall away underneath and are easily removed. I believe other brands the ashes lay where the wood burns. If you don't mind the look of the stainless, it never dulls and you will not scratch color off it like other units.
There are some things I don't like. I wish the size of the door would be bigger. It has a decent sized wood box, but the size of your rounds is limited by the size of the door. Also, I feel it could be insulated better than it is. While I don't have anything to compare to, others that have put additional insulation on have reported longer times between feedings. I also wish there was a better way to extend the chimney higher than a couple pipes. I am sure there is, but it is difficult rigging single wall pipe without some kind of extensive bracing so it won't fall. Other brands use double wall pipe that is easier to extend. Also, with the chimney coming out of the center vs. the rear, it makes it harder to brace if you want to go up.
These are the things that come to mind. If you have any questions let me know.