Judging a person by the looks of his little toe, are you?
PT40 sits at the very low end of GP's offerings. At that level, simplicity and easy of assembly are much more important than form and aesthetics. I've seen it in person, and it's no worse than the Superstars and the Alpha Trainers.
Before you make a blanket statement on GP's quality, at least wait until you've seen a few other GP ARFs. I have no doubt planes like the Patty Wagstaff and Pitts Specials will change your mind about GP's quality.