The quality of IPAS is quite good. The exercise bike bought at home is very stable and durable, with little noise. I have used it for more than a year, and there is nothing wrong with it. It is said that IPAS will strictly follow the industry standard of fitness equipment (by the way, the industry standard is higher than the national standard), and carry out professional tests on various series of products, including reliability and durability, and ensure product quality through multi-dimensional assessment such as product running speed/frequency, load, impact frequency and stroke.