Timely thread: I've had a two post Atlas 12K lb vehicle lift in my shop since I bought my farm back in the fall of 2013, but have never used it to lift/hold a vehicle until this last weekend. For some reason, I just didn't trust it.
But I finally did use it this last weekend to lift and hold my Kubota RTV to change the transmission oil and filters.
On the Atlas, it's electric over hydraulic to lift the vehicle. But then you release the hydraulics to let it down onto mechanical stops so you can work under the vehicle. The first time I got under the RTV was pretty nerve wracking having never worked under one before. Didn't take long to get used to it though and the job went pretty fast. In fact, given the damage to the under armor and tranmission drain plug, it would have been almost impossible without the lift.
It takes two hands to allow the lift to drop completely (one to release the hydraulics, one to bypass/unengage the mechanical stop) and is very slow.