This was my first kayak, back in 2002. As a really heavy guy, I went with this because it paddled well solo. The front seat will slide back till it hits the rear seat. Then you have a good space back there for a cooler or fishing gear.
It is very stable, but can get a little wet in larger chop. I had trouble with tracking and think it was half my amateur paddling and half the very flay hull up front.
The only other negative is that this guy is really heavy.
Positives: Stability - It is a very stable boat. This is nice on moving water, paddling with inexperience folks or a dog, and when there is something interesting to look at below the surface. I've even stood up to board larger boats.
Versitility - We've used it on quitewater to class 2+. It does great. Solo or Tandem.
Negatives: Tracking - I don't think it tracks very well. I think this can be attributed to the 'full' bow, which is great for surfing (doesn't dive). Maybe the rudder would help.
Wettness - the boat is pretty wet even in small waves/chop. If you're paddling tandem and you're sitting in the stern, its fine, but the bow person gets soaked :) A spray skit is recommended.
It has been a nice boat for gunkholing and paddling on quite ponds and even quick moving rivers. I think of it as a combination of canoe and kayak.