Had on of the Torin models I believe from PepBoys that I think is like the lightweight one you get from Harbor or Northern. Seemed to struggle some with the weight and died an early death. Stepped up to the Craftsman aluminum and it didn't last much more than a year either. I have wondered how long the high end 1 pump jacks like in Nascar would last. Have seen some for around $450. As much as its used and if it only takes one pump then its worth considering.
In the garage I have a heavy iron jack similar to what Al posted. But it won't get under the vette so I just use some ramps to drive on first and then jack it up. So you definitely need one that is pretty low profile.