I want to buy a tennis racket , and I choose the roger federer 27in model but I'm not sure about it .?

If tou are serious about tennis, that racket isn't even worth your time. This racket is made for people who are just starting out, and the fact that it says Roger Federer on it is just marketing. If you like the look of the racket, then get either the n-code or the K-factor (the real versions of this racket)

The best recommendation I can make for you, if you're in the USA, is that you go look at Big 5.

No matter if you're starting out or playing competitively, Big 5 has excellent selection of rackets for reasonably cheap.

I've had a Hyper Hammer 5.3 for a few years, and its a good (not the perfect) racquet for me to play with.

They might be a little old, and considered midrange, but they're good for many levels. (I have to say the stability the O3s offer puts my hammer to shame)

looking at the image, this is an aluminum racket. if you are serious about your tennis, it is not your racket. federer endorsed wilson racket so wilson put his name on all kinds of rackets the make. of course a nice racket wouldn't cost this little...

usually rackets w/ a name on thm....like federer r total ****.....i just got a wislson hammer 5.o....and i love it....it was pretty cheap too....i got it at big 5....its vry durable....also....u can rent rackets from sports chalet and big 5 has a very gentle return policy...so go to those stores and try some out