First Don (twolane) is correct, if you have room buy a table lift, SO much better. But if not, I have owned a J&S (Craigslist), a HD (also Craigslist), a Blackjack (now out of business) and a Pitbull also bought off Craigslist.
The HD is a pain because you had to screw, by hand, the jack. Just sucked. The J&S is great and the strongest as shipped of the bunch. The Pitbull I bought the rotating table for which makes it much more secure and makes the lift so much more useable as you can sit on a stool in one spot and rotate, with one hand, the bike 360 degrees.
I sold all the lifts a few years ago except the Pitbull because mainly the rotating table and the fact the guys are always at the m/c events if you need a part or something. But if you are going to use them as they come, with no options buy the J&S. But NEVER use a Craftsman or Harbor Freight on a motorcycle approaching 1000# (fuel, crap in bags and tourpak). They just have too small a footprint and become tippy. IMHO. Also remember that the lifts are designed to be used @ full height, this puts the weight more squarely over the "footprint" or base of the jack. when partially raised the bike is extended out over the side of the base and not over it. You want the bike as directly centered over the base as possible. The best lift will tip, if not level and bike is not centered. Watch the guys who climb around on a bike while lifted and they are always at max height.