I have ordered from them and had difficulty all year. Everything I have ordered this year has been on back order and has taken 6 to 8 weeks to receive. I ordered one plant Golden Club that arrived as mush and then about 4 weeks later finally got a plant from them.
Their catalog contains everything you need to start/maintain your water garden. The locations in MD and Texas are available to visitors through 10/31, and from what I heard from friends, have beautiful garden ponds. They also have a Koi Festival toward the end of September.