They have just come out with a newer, better version. The new ones are higher priced but the older model is still good. The new ones swivel and have the pad on both sides. It is a better design, probably from customer feed back that gave suggestions on how to improve them.
I love my shark. It truly is capable of doing what they advertise. I got a new dryer for my birthday in February, the delivery guys were going to haul off my old one so when they called and said they were on coming sometime in the next hour my husband moved my old one on to the deck.
Underneath the old one was a lot of goo where I had mopped and at the edge of the dryer it had packed and dried. I had gotten my Shark for Christmas and had really only cleaned the floor in the kitchen and bathrooms with it. I filled the tank with water and just started to plug it in when my hubby says "They're here". I freaked, I was sure that the goo would not come up without letting the Shark sit on it while I pumped it to get it really steamed and loosened. I started going over it and by the time they got the dryer in my house, less than 5 minutes, it was clean and dry.