Well, nothing technically wrong with the sculpt, per se...actually, it's a very well done piece, as they all are. I should have said I didn't like the design of the T-Rex they chose to sculpt. It's quite original: big puppydog eyes, semi-alligatorish serrated back (like Horizon's old T-Rex, which I also dislike), kinda short and dumpy. The main problem for me is it's just too cute! It's kinda smiling, too.
So, basically, it's just a matter of personal taste, I suppose. While the sculpt itself is technically excellent, the design just doesn't fit my image of what T-Rex should look like.
Now, the Kaiyodo dinosaurs ROCK!!! Amazing sculpts, and I love the designs.
They ain't cheap, but they are, in my opinion, the epitome of dinosaur modeling.
Check 'em out!