Tried the demo, was OK
But I played it still and well it wasn't that bad. There is realism, the sounds are good, specially for Sharapova!
I probably wouldn't get, this but that is probably because I am not a tennis person, although I think it would work well for many tennis addicts. There is also the reason that it is the only tennis games for the 360 yet, but I guess there is also Virtua Tennis coming soon which I think may be better than this.