I have been very happy with my Haskel sport. Better than a friend's HI that I fixed for him one day. The Haskel has smoother strokes where the HI bangs a lot harder as it cycles.
I only drive mine off 100s when doing parking lot fills. They don't go that far. I know some that do it more often and use doubles to get the volume needed. My 100 gets pretty cold as a drive bottle, maybe cold enough to condense inside? My typical drive gas is at home with a good shop compressor. So it isn't efficient sucking the bottom of a bottle, the compressor just runs more. I also switch to a transfer bottle, an extra AL80, to get the last few hundred PSI out and up to a mid level pressure. Use a single stage as a 2-stage, just 1-stage at a time. That takes a lot of drive gas. But the compressor only needs electricity.
It adds a layer if inefficacy, electricity to compressed air to drive the booster. But allows it to work at home or on the road. It isn't that much electricity. And a shop compressor needs a fraction of the maintenance that a dive compressor needs. Drain the condensate daily (if even used daily), bake the dryer pellets dry again when they change color (toaster oven) if not just replace. Oil change every once in a few years. Air filter every decade or so as long as it is in a somewhat clean place.
