Nothing wrong with it at all, it's a good model, well made and well presented, he's done an excellent job on it.
I just wish that most of them 'damned yankees', would stop navel gazing and broaden their horizons, then actually acknowledge that there are a lot of excellent modellers, from ALL over the world.
Here's another scratch-builder who happens to use cardboard as a modelling medium, and he sure can produce excellent models as well.
Do a google for "cardboardfido", he's an excellent scratch-built modeller from New Zealand.
http://public.fotki.com/cardboardfido/http://s211.photobucket.com/user/cardboardfido/library/?sort=3&page=4