That's funny, I have a metzler in storage! My dad bought it new in the 70s and I inherited it...time had been ok to it, but it needed some work. I ended up removing and reglueing all the rubber mounts on it. Great little boat, but...it is a little boat!
I don't have a jet, but I have had it in rivers, lakes, and even fished silvers in valdez. With a 15hp prop it gets on step with two guys totalling close to 500lbs. (that impressed me)
For a boat with an inflatable floor and no keel it does pretty well. (the inflatable floor would make it perfect for packing in an airplane...just deflate, roll it up, and shove it in the plane)
I finally have a small flat bottom jet boat that is able to fit the family and really run the rivers, but I'm saving the metzler for some four-wheeler-in lake fishing or maybe a DIY float hunt with a friend that has a 10' zodiac.