My wife and I just bought a new 171, right after buying a small pop up. Actually she saw the pod when we went to pick up the little Starcraft and fell in love. 2 weeks later, we're trading in the pop up for the 171.
We went ahead and bought a used van to pull it, but in spite of the 3500# tow rating, and the salesman's assurance that it would pull 2200# just fine, it had a great deal of difficulty getting past 50mph on level ground. There's a horror story that follows that, but I leave that for when it's all resolved.
Anyway, we have the 171, and pick up an 04 Sienna tomorrow, and once I get the hitch on and wired, then the brake controller installed, we'll be able to do more than play with it in the driveway

We're looking forward to exploring the Southwest USA in our "Escape Pod" during the next couple of years.