I have had the ProX9000 for approximately 2 weeks now. It replaced an old York machine which had given up on me. I didn't have an unlimited budget, so was looking for something to give me value, but of course wanted as high spec machine as possible. I read another review which mentioned the Pro X900 so did some internet research and found it on the Orbus web site. The price was great, but I did some searching for cheaper prices which is always worthwhile! It arrived fairly promptly and when I set it up (which was very easy) it looked very impressive. It has all the usual features you should expect from any quality treadmill, like quick start, incline, pulse sensors etc etc, but the most impressive thing for me was the low noise level and the smooth running of the belt. It gives a great running experience, with some fantastic cushioning springs (my old machine said it was a cushioned track, but it had nothing like this). The claim is that this reduces stress on your joints and I can really see how this can work. If you are able to keep up it will reach 20km/h, but I haven't reached this yet! However I do really like to high incline. It can reach 20 degrees which is more than most. I use this for a steep walk to warm up or down or just too really get the muscles working. I have nothing really negative to say about this machine. Possibly some people may be looking for a very wide track which this doesn't have, however I'm over 6' and it is more than adequate for me. Overall this has been a great experience which should keep me on the fitness trail for some time to come.