We have them but our boys are still heavy into them. We have alot of the "real" Thomas stuff, our sitters boy got the imaginarium ....pretty much the same stuff and came with a train table, bridges, buildings, and towers for maybe $100-150 around christmas time. The kids really don't know or care if it has Thomas train stamped on it so save yourself the money on the set. You can buy the Thomas train cars ect and they work on the track.
http://www.toysrus.com/product/index.jsp?productId=3140254