Read reviews for the Horizon 15 by Mad River as submitted by your fellow paddlers. All of the reviews are created and written by paddlers like you, so be sure to submit your own review and be part of the community!
My first Royalex canoe and I have been wanting one for a while. I would probably have rated the canoe a 4 due to some tracking issues I have had with it on larger rivers etc. but when it comes to all around effectiveness and comfort this is by far the best canoe I have paddled. I would say it is best suited for smaller rivers or if you are on open water keep up your speed to keep her straight. I have had it loaded with my Wife and two children and it seemed to handle the load very well. I never really noticed it being any more "tippy" than other canoes either as in some of the reviews I have read. I like the capability of it being a trip canoe with family and gear and also working vey well as a fast solo boat. Also being very light and easy to portage and load on your own. Very pleased with canoe.
I will say that it's a great handling canoe, easily turned, not great for straight line tracking... but the biggest problem I had was the stability. It seemed to have little initial stability, even when loaded, and I had a hard time enjoying the ride, even solo. Secondary stability, on the other hand, was great, and you could lean it to the gunwales without too much fear. I could never get past the tippy-ness of it, and moved on to a Spirit II.