I went shopping at Katherine's a few months ago for my wedding gown. It's definitely not a full-service salon, which can be off-putting for some but a really nice thing if you're one of those hands-on shoppers. I didn't personally like going to other salons where I couldn't even see their whole selection.
I went to Katherine's with a friend and we were free to rifle through the racks and try on whatever we wanted. It's a really small shop, and there are basically two dressing rooms. The blocks where you can stand on to look at the dress are right next to each other, so it can be a bit of the "dueling brides!"
Bottom line, nice stuff at pretty good prices (around $1,000 - $3,000). A lot of the stuff they have are the more simple designs, which was definitely something I was looking for. They have Watters, Janel Berte, Amy Kuschel, and others. I didn't end up getting my dress there, but I would recommend it to others!