Nila,
i have the ATI Remote wonder as well,
the RF works fairly well, i can easily go 20+ feet away from the reciever, however, there are dead spots in my house as well.
i bought it thinking that it would replace my current setup which is a tivo remote (if you go to tivo.com and click on store they sell just the remote for like 35$) and a USB-UIRT.
But i still use the tivo, the tivo's layout is much nicer now that ive had a chance to use the ATI for awhile. For me the Vol up/down and Ch up/down should be vertical(tivo) not horizontal(ati) because its nice to use the chan button for page up and down too, which seems counter intuitive. (i know thats not a bid deal and something you can get used to). But the playback controls are on the bottom of the ATI and the vol and channel are at the top, which is very akward when using the remote for music/tv/video. The other annoyance of the ATI is the direction pad has a really small OK button, its very difficult to hit correctly. Occasionally i get some strange hang ups too with the ATI, like it wont respond for 30 seconds or so.. then its fine. But i have not heard of this problem from other users, might just be my system.
I run both remotes now, with hopes of using the ATI to control multi zone playback in the future.