Gohan
They are paying testers to say good things, but that doesn't necessarily mean it doesn't work. My online golf store came because I liked a product so much that I started selling it to my friends - it went on from there. You just have to be cautious, and that's exactly what you were - going online to get opinions. Much sharper than I was at 13
As much as the strength training will help your game, I also want to stress how important those weighted
clubs are for increasing flexibility. That will be even more important in increasing your length than pure strength will over the long run.
Some offline golf stores carry the Momentus, so go check it out there (and fiddle with all the other cool golf stuff while you're there), then buy the club online.
True, there are some cheaper ones out there, but the Momentus comes with a bunch of extra freebies that you may find worthwhile. They put together a quality club, too. Guess it really depends on your parents' budget.