John,
I do not own a G-3, however one of my hunting buddy's own an 18' G-3 with a 90HP Yamaha on the rear. I believe he bought it in '04 or '05. Since he has owned it, the weld that runs along the bottom corner of the boat has been re-welded at least twice to my knowledge, not from hitting anything, but from stress alone. Several of the rivits in different areas of the boat have popped out. The paint on the boat is almost totally worn away, at least on the inside. On the flip side, the boat moves on the water. It can handle a lot of gear and it is pretty comfortable. The boat, in my opinion is a pretty light boat, as compared to some of its competitors as well. Granted my buddy puts it through some abuse as he uses it almost everyday for either fishing or hunting. In my opinion there are some much better built boats on the market, unfortunatly with the better quality comes a higher price. Just my 2cents.
CJ