I've have never tried this super glide, I live in Dallas Tx, and up till the other day, no one down here will admit to buying one.  I did however talk to a guy in Maine that purchased one, and he said it was a piece of crap, would not get close to walls, and keep getting clogged up, and didn't make the job any easier.  The main reason I would have even thought about buying one would be, because it would make carpet cleaning easier, but still clean the carpet.  Then when I found out that he made them for the RX-20 I though WHY? I've never had any problem pushing the RX-20 around, unless their was no elect., then I try not to use the RX-20, so why would you buy this for a RX-20 or better yet, why invent it for the RX-20.  Maybe he is in it for the money, and whats wrong with admiting to that, Thats why I clean carpet.  So I think about the quality of the product and the person sell the item, I notice under kens name he also sold the turbo duct cleaning piece of crap, and I know that for a fact, I purchased one, It sounded great moved alot of air, and had the ease of being put on your truck mount hose(just make sure you glue it on or it will come off) anyway after doing a few jobs I just didn't feel it was working, so I had a friend with a camera that would go into the vent and take a look, after seeing that it just made a lot of noise,and cleaned nothing, I went back and refunded the money on the jobs I did, I think it is just a marketing ploy,  try to be honest and build a good product the first time, and if its not then don't push on people with dishonesty