I looked at one of the $299 verticals at my local Academy last week. The first thing that caught my eye was the rack tracks in the vertical smoking section. They were welded in crooked, so the racks didn't rest horizontal. That sort of turned me off on it.
The overall size of the unit is very compact, and you can probably do some great que in it, once fire/temp control is mastered. The smoking chamber is pretty cramped for sure.
Craftsmanship wasn't very good on the unit I checked out though.