hopefully not too OT: experience with bluetooth range extender

pure's icon

hi
had anyone (good) experiences with this one:
http://www.aircable.net/host-xr.html and max?
i am thinking about using this in a 40x15m (132x50ft) room thats full of
glass cabinets to talk to a macbook with a cellphone.
or would anyone recommend any alternative solution preferably for os x?

thanx in advance for any thoughts

p