We have had the gtech floor cleaner for about 2 years and cannot in any way fault it. In fact, it is brialliant!! Expecting the same for other products, we just purchased the Air Ram Mk 2 - nd we have returned it. It is supposed to clear any type of floor surface. We found it a little difficult to move on even a non-pile rug (would be tiring if it had to be used for any length of time), but on a pile carpet we have, well, that would be exhausting. My partner had a problem in getting it moving, and I must say that I found that same problem, and I'm no weakling. I can honestly say that we have NEVER known a cleaner which has required so much force to use it. If every one is like this one, I fail to understand why anyone should give it a good review. We are aware that Gtech say that you can remove the brush roller to make things easier - well, removing it in our case made very little if any difference. The only good thing about it was that it was cordless.