Our shop(where i work) is switching over to the "cassette" type in-ground lifts, i cannot give you the brand because well, im not really sure, they are not done installing,(the concrete is curing) but i watched and took some pics, i will post up later, it was a pretty simple deal ..cut out the concrete, drop in the lift, re-concrete around it, voila!! i also understand they operate on a 12 volt system, so far they only installed 2 in-grounds and three 15k Rotary 2-posters, but rumor has it that the rest of the lifts..15 more of them.. will be the "cassette" type in-grounds. i actually think they are going to work out good..
<btw> in my own old shop(see sig) i have a in-ground hydraulic with a remote resivoir, i want to say thats a Globe lift, its been going for gotta be more than 40 years!!
its still working to this day, everyday!!