So far I can only say Hammer exercise bike. The exercise bike is very quiet and has many functions. Why I unplug one star is because I have unfortunately device replacement. The first device that I got delivered was unfortunately defective. The display did not go on. Because of I was only disappointed. I called the same on Amazon. The woman on the phone which is very nice and gave me even offered that I can use the device on and must reduce it not quite. What have I done habe.Ich but still useable get delivered on 01.02.2015 the first device, the second where I was very impressed by was already on 01.06.2015. I was convinced to buy the video of this device. I can say I had the problem still useable strong buy recommendation.