I've got the smaller laptop edition of this model in use. Not had any problems with it except that my TV reception isn't very good where I live anyway and that does effect the quality of the picture.
One thing though, it dosen't seem to pick up all the freeview stations. None of the music channels were picked up on the autoscan and I haven't yet tried to scan manually for channels.
I'm not an expert at these things but getting it installed on my system was very easy with the new drivers available on the website.
I can't say if it's better or worse than any other product on the market, I haven't tried any others. Try this review though.
I hope it helps...