I can't compare it to other single seat canoes because I never paddled one. The Camden feels a little faster and catches the wind less but that is only going by "butt dyno". The Next is light years ahead of the Radesson I have.
The Next will spin on a dime and goes just as easily backwards as forwards. Glides better than the kayaks, for me, and is really a lot of fun. Stability seems fine for me though that is subjective. Secondary stability is excellent, I leaned on the sides(within reason) and couldn't get it to take on water. I am glad I spent the extra coin and did not get a kayak.
I let my son, age 9, take it out. He paddled it without a problem and even sat in the middle of the lake spinning it around (he thinks I need to get him one now).
I'll give it a 9 until I can get my hands on a similar hull to compare it to.
They are extremely stable and easy to turn. They track well and the kids have no problem zipping across the lake in them. The only draw back is they are tall in the front. The wind has a tendency to catch them making them harder to paddle especially for the younger child. For the price they can't be beat. They are a quality product that my kids will have for a very long time and be able to grow with.
It is a great kayak made out of 3 layer poly but light enough for me to load into the back of the truck myself. Had it on the lake with the wind out of the NE at 15. It effected it a little but not bad. It is an excellent Kayak that I would recommend to anyone