My dealer told me that it sounds great and most of his customers love it and have no problem with interference from a WiFi network and/or Beocoms (just don't put any of the equipment too near the microwave oven). On the other hand, when the wireless was first introduced, there was much complaining on this forum about problems with interference.
My cynical side says "of course the dealer is going to say all is well - he wants to sell me something". Then again, I'm in the US where we mostly build our homes from sticks and paper and, in my area, not densly populated. If I recall correctly, most (if not all) of the complaints on these forums were from folks living in densely populated areas and/or with thick concrete/stone/metal walls.
Personally, if a dealer tells me not to buy something, I would listen.
Stan