My old Linksys WRT54G finally gave up the ghost today and I had to use the router provided by Comcast(Xfinity). I can't complain of any problems really, at least not yet, it's only been about 18 hours, I can only say that the thing is kind of cheaply constructed.
Simple to set up; inexpensive (free with Xfinity package deals)
Cheap construction; not the best range; kind of flimsy