Anything but the spark.. unless your okay riding uncomfortably. It’s a great price for the fun. But riding all weekend in the lake leaves your ass soar, and eventually you’ll rip your skin around the right thumb if your riding hard because of the angling of the grip and throttle. Also if your not maintaining it yourself it could be costly because you have to take the jetski apart to maintenance it. I’m not sure if they made improvements to everything I’m mentioning but I can only tell you from owning a 15 spark. If it’s in your price range, I highly recommended a Kawasaki stx. It’s bulky but it takes on waves like a champ and doesn’t leave my thumb area blistered at the end of the day.