I've been to Babies R Us... kiddie kandids a few times. I moved here from delaware and had multiple sittings at the kiddie kandids in DE. I think they are very similar in the setup, back grounds, photographers seem to be consistent.
I just went recently and I was an hour late for my slotted appointment, there were a few people waiting for portaits to be taken, and they take walk-ins as part of their service so they fit me withing the hour/45 min. I had an appoinment the holiday before last, was early for my appointment, and was taken late. So it totally depends on the volume they are experiencing.
I really enjoy the pictures that they take, close ups, props, etc. My son is very friendly, so he doesn't have a warm up period to the photographer. But they are trained in how to work with kids.
My favorite part of Kiddie Kandids is the you purchase the pictures, they review them with you, and you can purchase and take home same day. You can also send the links on line to family members, and they have online sales.
The sheet prices at kiddie kandids are around 19.99 a sheet. They cost more if you add on borders, multiple shots, etc. Every birthday you can get one free 8 x 10 for each kid, but you have to purchase a sheet. I spent 60.00 on two sheets (both had borders/changes) I got enough wallets to send to grandmas, and added his 3 year 8x10 pic to the photo frame that holds them. I think the packages have a good amount to offer, but never purchased one because of the size of our family, and I give most of the pics away. I only need to hand out wallets!
Good luck. If you want to stop by either place, to get a feel on which one you would prefer better, I'm sure they would talk to you and let you look through their background book etc. kiddiekandids.com is a good website for ideas.