I am currently in possession of a MagicMobility V6 (the more compact descendent of the Frontier). I drove the Frontier a couple of years ago and really enjoyed how well it handled and where I could go with it so I was expecting the same experience with the V6. I have taken the V6 through the same terrain as the X8 and found that for the most part it's able to keep up. Note: Both the X8 and V6 came with a really slick plastic footrest. As man with muscle spasms, I found it incredibly annoying to have my feet constantly slipping off. GRIP IS A MUST.
What the V6 has going for it:
Handling- Because it's a MWD it is a cinch to maneuver indoors and out as well as in tight quarters. The low inflation knobbies and the high torque motors make V6 right at home in the mud as long as you're minimizing sharp turns and back and forth movements.
Base Size- I was told by the rep that the V6 was made more compact than the Frontier. Helps indoors and makes loading it in the van super easy.
Downfalls:
Two wheel drive- Where I'm from if you're driving a two wheel drive vehicle you're pretty much saying you're not from around here. It being a MWD means two wheels driving and four wheels dragging. Like I said this wheelchair is fine driving straight on through the mud but if you need to do much fore and back you're going to be disappointed. The V6's drive wheels slipped more than a few times while I was trying to set a boar snare on damp ground. Without the all wheel drive (or tracks) it's pretty much unavoidable.
Seating system size- it seems to have the same seating system as the X8 which is bulky and not sexy. I may be paralyzed, but I'll be god damned if I'm not going to look sexy in my chair. The tighter the chair fits the better. Bulky seems to be a theme with most wheelchair companies.
Overall good chair. I, however, prefer the MM X8 ATV for my situation and terrain.