I have a Tuff-Lift hoist in my shed - it has been there for about 2 yrs
the hoist is a lower end model with a base plate, pad height adjustment is via tubular extensions under the lift pads and the catches have to be individually released from both sides (but it fit in my shed
)
When it was being fitted the drill punched through the concrete at least once - the depth of the concrete was measured and was bang on whatever the minimum was.
The fitter was very particular on this for each bolt as well as checking the distances to edge of slab - for one bolt there was concern that it was not tightening enough - but then it did and was pronounced 'OK'.
Generally my experience with the company and installer was positive
LoBelly