I am using 2750U and it had a lot of connection drop issues. I attached a splitter to every phone in the house and also to the router. There have been almost no connection drops since then. Been 2 months and maybe 1 or 2 connections drops in these 2 months. I haven't tried USB or transferring files between laptop and desktop so no comments on speed. Regarding range, if the router is in the living room, laptops 30 feet away can easily connect even with single wall in between.
