Very good exercise cycle for this price with back support and twister. Received without damage. Only one star reduced because they didn't send installation technician to my location. Instead they send me video to install manually.. It's easy only but we can't tight 100 % with the given spanner tool.
I've been using it for just two days now. It has been working quite well, doesn't make any noise. Satisfied with it. The only disappointment is that even after their promise on call, no-one was sent for installation. It took me 2 hours and some help of a mechanic to fix it properly. Although, they do send you a video to help out with the assembling process, so that's a relief. And they are also readily available on call for any sort of help required.
Overall Build is quite strong and stable. No problems on that front. Seats are comfortable for a long sessions. Although the back support is not really required. You can buy the one without back support. Tracking is simple to use and read.
There is however one problem that after using it for about 800-900 m, it stiffens to a point that its not possible to pedal. Once this happens you have to stop and make one reverse pedal and than it comes back to its normal resistance. So basically you cannot have continuous session, you have to stop, do one reverse cycle and then start again. This stiffening frequency increases as you pedal more.