My friend went for one, seems to be very reasonable at $150 for 60mins session. www.foto-u.com, pics turns out well.
This one solely for baby shots only, looks very good www.seanlau.com
Wanted to bring my baby for family photoshoot too, but friends advised me to wait til baby can sit or stand so there can be more poses. My girl only 3.5 months old, so still got a while to wait : )