Some of the video ones can sport-fuck your wireless and jam things up.
Get a cheap audio one. They are very reliable, and ultimately they are all you need.
IF you have to have video, get a Dropcam. Do not rely on Dropcam to stay connected for hours on end, though. It won't. And it's a pain anyway not having a dedicated receiver.
Trust me: rely on an audio-only unit to hear if your kid is crying or whatever, and if you have to see them get a Dropcam because then when you're done with them in a couple of years you won't be left with a worthless baby camera, plus Dropcam's quality will smoke most of those cameras anyway. You don't need to pay for a subscription if you're only viewing real-time. Also lets you set it up at other times, like say you go on vacation now you have an access-anywhere camera. Get the Pro, not the HD.
I am big into cameras and gadgets and the video baby monitors I've seen are a massive waste of money. Quality blows for the price and you're stuck with a silly thing later on.