I've got one maybe 33% done. It's not a bad kit, but there are definite caveats and things that can be improved if you want to.
* Fit of the upper hull to lower is usually pretty bad. The lower, red plastic was often popped out too early and "clenched" like fingers squeezing, so it's a bit narrower than the upper hull. It's unfortunately strong enough that it will crack the joint if you manage to man handle it together, so most builders use wood dowels to spread it out and hold it.
* Alignment tabs for the deck pieces cause more problems then they fix. I'd recommend razor sawing them off and then laying them out inverted on some wood so that the upper surface can be lined up flat to minimize any filling and sanding. This can be somewhat problematic in that you also want to line up the planks, but I was able to pull it off by lining up the planks, taping one side of the deck to hold the alignment, and then pressing wood down to the deck to line it up in the other direction, similar to what I did here.