I have this phone--pretty nice. It's a heavy handset, and I think its interface is a tad clumsy (e.g. you have to press three buttons to get it to redial) I have had a few issues where the handset will be right next to the base and will say "Out Of Range" but all I have to do it sit it in the base and try again--it always works the second time.
I'm not sure if it conflicts with 802.11b, although since they both run at 2.4GHz then that is a definite possibility. The only other thing in your house likely operating in that frequency range is your microwave, believe it or not. I'll get static on the phone if the microwave is on and I walk by it. But as long as I'm not right next to the microwave I don't get any interference.
Oh yeah, I have one of those X10 Video Sender units to send mp3s to my living room stereo. It also operates at 2.4 GHz and when I tried to use that and the phone at the same time (in the same room) I got lots of static on both ends.
Anyway, 99% of the time this phone gives me no problems. I should have bought the model without the answering machine though, as I use evoice and find that to be much more convenient for me. I guess this one will be good as a backup though.
Finally, I bought this phone a year and a half ago for upwards of $200. Even refurbished I'd think you're getting a great deal. What's the warranty? 90 days?
l2c