MaxJax M6K $899.95 iBaggyo

I have been using mine for about 10 years now, zero problems or concerns with it. As RustyRatRod stated, it's made by BendPak, so no worries about quality. I do wonder about the legitimacy of the sale price in the ad, I paid around $2300.00 CAD for mine. Yes it only lifts 48 inches, and I have a stool that I roll around on, but unless you have minimum 14 foot ceilings, you'll never get a full lift hoist anyway. I also have back, knee, and foot issues, so I'm fine with sitting. I've done multiple engine swaps, transmission swaps, my transmission jack does fit under and work fine, brakes, front end, exhaust, you name it. Beats the hell out of laying on my back any day.
BTW, I am 6 foot 7 inches tall, and still have no problems with being underneath any vehicle.