They know comedies are supposed to be funny, right? There are some laughs, but they are few and far between.
So Leatherface seems to be in his early 20s here, maybe even as young as 16 (which seems highly unlikely). What irks me, is that he's twice as small as the real Leatherface character. Leatherface is a huge guy (6'4" and 270 lbs) and this guy was like 5'9" and 170 lbs soaking wet. People at that age don't grow much more, if at all.
As for the content of the movie in this millionth attempt at a Texas Chainsaw Massacre film (prequel), it was just ok. I wonder how many more of these they will make to further dilute the originals.