We had a guest at the Resort up with one last summer and I was very impressed with the build of the boat. Very solidy built with .25 bottom and .19 sides (heavy but solid). The welds were all really clean, the interior finish and paint were immaculate and the location of all the interior accessories was well thought out. I was really impressed with the look and feel at the dock.
That being said I did not like the setup he had with a single center mounted captains chair with two long handle controls on either side for steering and throttle. It was hard to steer and throttle without a bracing point other than your feet when in rough water. I don't see that setup on any of their 2008 models so they may have moved away from it. I also found the boat very slippery across the surface as with a draw of under a foot the model I was in was cleary designed to be a river boat not to be tracking through waves. I couldn't catch anything on their website about hull angles but it might be something to watch depending on where you are going to be running the boat.
Two other things I didn't care for was the standard difficulty of reversing a jet engine. If you are going to be jockying in and out of tight marina spots jets are not for me. His boat was also REALLY loud. I'm not sure if there was an insullation option package avialable but with 500hp of engine you want to buy some serious noise dampening. It was like sitting in a dodge viper, your whole body vibrated.
My take away was that I'd personally never buy one of their jet boats for the ocean but that their boats were so cleanly built I'd like to take one of their outboard models out for a spin to see if their hull design was a deep enough V to be up to ocean weather.
No idea what their price points are so don't know how they stack up from a value perspective against the usual rogues gallery of welded aluminum providers.
We just bought a used North River 19 and the finish is good, but does not impress me as much as the Thuder Jet did - but this one was cheap