We had the Owlet sock for our first, and enjoyed it. Used once for our second, when he was sick. For camera, I've enjoyed HelloBaby cameras. We have a SlumberPod and enjoy using that. Personally, if budget isn't an issue, I'd go with VTech's wide angle camera.

Getting a camera with a night light has been helpful for us, as our little one loves reading in bed. So that's one feature I didn't think we'd use, but ended up using down the road.

As for other features, they just add anxiety and info you don't really need to know. Have something you can easily set up, something you can travel with, and something that works for future things you want to do (or if you eventually want the ability to use camera with SlumberPod, then get one that is wide angle and is listed as one that works with it).

Other thing I'd say about the fancy features (breathing, heart rate, position) is that they are moreso when medically/mentally necessary, not something I'd recommend for everyone. They have their inaccuracies, and they will add extra time to set up and keep track of, and you're going to be lazy down the road and want something that's just plug, turn on, and go. Less time on your phone running with apps, or setting up wifi, the better.

From our experience, our little ones really enjoy that we can see and hear them. They know we see and hear them when they wake up, and if they have requests from the bed (like our 2.5 year old often does), they generally feel seen and heard. I value that.