My 13 year old son uses these, they are great.
he will move on at the end of this year, I think (they are a bit light), but for his smallish frame and high level game(top 50 nationally in 14s) they have been perfect.
I would advise anyone after a lighter 'tweener' to give them a try'
whoever called them a 'game improvement' racquet is way off, they are quite HL and only slightly OS, nothing like the 8oz snowshoes in that category
Volkl make those, too, but the 4s are nothing like that..
5.0 all courter. 2 x Donnay X-Dual Platinum 99s 2 x Donnay Formula 100s (no, really!)
"Tennis isn't easy" - Corners