I think this is great idea. Personally, I don't really want anything shoved up my butt either so I don't blame babies for not enjoying it. Also, getting a reading from under the armpit isn't as accurate as I think this would be. A little expensive for a thermometer but worth it in my opinion.
I love this and I already one of course. I think it just looks so much cozier and easier to use than a baby carrier that has straps that dig into you and the baby. I mean, look at that baby. How cute and comfy does he look?
Highchair/Shopping Cart cover
I know this isn't something thats needed but I think its super nice to have. I work in a restaurant so I know how nasty those high stairs can be and I can only imagine what shopping carts go through so to have something that protects your little one from all those nasty germs would be pretty nice to have. Plus this specific one has fun colors and a couple little toys on it to hopefully keep the baby occupied long enough to where you can hopefully get one thing accomplished without a screaming kid.