Re: baby legs
I loved them on my DD as a newborn b/c I despise the look of a onesie with pants. I think it makes babies look like a little old Grandpa with their shirt tucked in and the waist too high so she wore onesies and BLs a LOT.
We took a break from them during the summer months and now I love them under her skirts and dresses. I really hate dealing with tights. BL are so much easier.