My wife has advanced MS and was unable to climb the 11 stairs to the upstairs bedroom so I researched on the internet for a stair lift. Ameriglide was the most reasonably priced and the reviews were almost all positive as was the ease of installation. I purchased a re-furbished unit (looked new to me). It arrived in 3 large boxes about a week later, I got my neighbor to help carry the base/seat unit to the top of the stairs, the rest of the install I did my self, was really easy with excellant directions. My wife now can traverse the stairs up and down. She still has problems with the 2 stairs at the bottom she has to climb to get to the chair landing, maybe Ameriglide will come up with a curved 90 degree section to eliminate this! Thanks Ameriglide.