The Stillwater does have a wide flat bottom. This makes it very stable and a little slower than a canoe with a slightly rounded or arched bottom. But it isn't a slug by any means! Frankly I was expecting it to be REALLY slow, but once I got her out on the lake I was quite surprised to find we could cover some distance quite easily. The Stillwater also has lots of room inside for all your gear, due to the wide flat bottom.
I also have a Old Town Canadienne, which is built for speed. The Stillwater is a mite slower, but turns quicker, and would be a better boat for camping with two people, a dog, and a bunch of gear. In fact, me and the wife are going to take the Stillwater up to The Colorado River and float down Glen Canyon from the dam to Lee's Ferry. I think it's the perfect canoe for that job.