4 post lifts

I'm looking to create additional floor space in my garage with a 4
post lift (or something else if anyone has a better idea).

I've sent away for info from Dannmar.

http://www.dannmar.com/dannmar-produ...ost-lifts.html

When I sent away, I didn't realize that they were sold at costco and
northern, so now I'm wondering a bit about the quality.

When looking at a lift to permanently park one of my expensive
belongings on top of another of my expensive belongings (not to
mention my own head), cost isn't a the top of the list, so I'm
wondering if anyone has one of these and their impression of the
quality and safety aspects, and if anyone has suggestions or
preferences for another manufacturer?

What should I be looking for?

thanks,
tom