We now have had our STX1200 for about 2 months. We run it 2 to 3 times a week in salt water in the Gulf of Mexico. This jetski has preformed well in everything we have wanted to do. Smooth or rough, fast or slow, it has delivered. It is quite, has quick response, is very stable, and gets through the big swells with out fail. I could go on and on...the bottom line is you want a great product, that runs like a lion, and is quiet as a mouse...buy Kawasaki, you will not be sorry.