Cramped over-priced generic studios are soo five years ago! I remember my first portrait studio experience as a "mom". Out of respect I will not mention the studio, but we waited for nearly an hour and a half in a gross waiting area...finally got in for pics and it was so cheesy and unprofessional. Not awesome.
When you use a professional photographer (not a studio) you get to be in your own environment...which comforts your kiddos...letting ME get wonderful pics of the natural expressions of your family. So important!
We start when you're ready - not when I'm ready - and we're done when we've "got the shots"!!! No stress.