Ok folks, I figured it'd be only right for me to come back and post...
I'm taking the Harbor Freight mower lift back. I think it's well worth the price, FOR THE RATED 300 LB. LIFT CAPACITY. I would for sure buy this lift over any other lift out there with same lift capacity rating. It lifted my 1988 John Deere 160 riding mower all the way up like it was nothing to it. But when it can to my Super Z, that was a different story. It would not lift it all the way up and felt like the bottle jack was straining or something. It never leaked down but I just didn't trust being underneath the lift, exceeding the lift capacity.
I have always tried to be as safe as possible. On the job or off the job. When I'm in a vehicle I wear my seatbelt religiously. So why take a chance being under a mower? There is no difference in my opinion.
After shopping around, I ended up ordering the MoJack Pro online from Home Depot, at a significantly discounted price. Got it today and assembled it. It is way better built than the HF model, but you pay for it too. I could have went with the MoJack XT model and would have been fine, but decided on the Pro because it wasn't that much more money and you get 250 lbs. more lift capacity.
Just like the lift from HF, I also recommend the MoJack. But If someone was to ask if I thought the MoJack is overpriced, I wouldn't even have to think about it. Yes is my answer, especially with the high delivery fees these days.