When everything is right, they are fine*. They rely on the manufacturer getting everything right and the owner using a bit of care if / when they do any maintenance. That's all.
* in the sense that they work and shouldn't make any unwanted noises. Durability may vary.
When everything is right, they are fine*. They rely on the manufacturer getting everything right and the owner using a bit of care if / when they do any maintenance. That's all.
* in the sense that they work and shouldn't make any unwanted noises. Durability may vary.