I have been using the wheelchair for over 10 years without failures. Only now do I change the inner tube. The wheelchair is stable and deep thanks to the option of raised armrests – perfect even for people who are not sitting alone. Thanks to the backrest adjustment, you can sleep in it, and the wedge between the body prevents it from sliding out of the wheelchair. Due to its weight, the wheelchair is very easy to handle and stable. I recommend it to others, it is a Mercedes among wheelchairs.