19 days after ordering I finally received a defective unit. I had to replace a battery switch that was too short to reach the switch. The pinch bolts were too long and busted off the switch plate on the first run. The seat wobbled like a teeter totter because the shims were not supplied. I waited a week for replacement parts then returned the stair lift. It took one month to get a refund of 61% of my purchase price. They are very lackadaisical about returning calls or emails.