The S16S is a perfect boat if you want more speed than the S14S but more stability than the S18SX . I would say that the 16 has 95% of the stability that the 14 offers with speeds approaching the 18 . Here’s my breakdown of speed (in times) on my 4.2 mile course going at a quick cruising speed, not all out. I did the course in 57 min w/the 14 , 52 1/2 w/the 16 and 51w/the 18 . All the boats were the advantage construction , for the most part equally weighing the same. Now having said that I’d have to say that my time w/the 18 could be faster with more experience, less balance concerns, and that’s where the 16 shines. If you don’t need all out Surfski speed and want a comfortable amount of stability, this could be the boat for you . So , is it a sit on top or Surfski ? Well if you are paddling around lesser boats , consider it a Surfski. If you are paddling in a Surfski rich environment, call it a sit on top😀. I think I’ll call it a utility ski, it has a couple of hatches for some light gear and a Surfski footboard for efficient leg drive, awesome boat and aesthetically pleasing to boot , definitely a head turner. At the time of this review Ocean Flight still has a couple in stock , better get a hold of Bob and get one for yourself , this is an excellent exercise and recreation machine and we all know how hard it is to get anything nowadays.