Stair lifts 

Ascendit stair lift and a Stannah Stair lift.
--- Ascendit ---
This breaks down a least once every year!
In this video the section of track that raises keeps refusing to lower which meens the stair lift can not get to the bottom. (Since filming the raising track has been turned off, so it is permanently kept in the lowered position)
--- Stannah ---
Stannah's proper lifts are nothing special, but their stair lifts are great.
When it gets to the top the seat turns around!
(if you turn it yourself it disengages the seat from the motor and it will not work until you put it back into the position it was in before you moved it)