I've been thinking about getting a motorcycle jack for my bikes and never made a final decision until just this past week.  After much research and reading testimonials from those who have purchased a jack, I have finally come to the conclusion that the best jack for the money and my bikes is the "J&S Jacks" motorcycle lift.  Talking and dealing with the folks before placing my order was very professional and informative about their product.  Shipping was fast and assembly was a quick breeze.  
This jack was originally something I just wanted, but never actually needed until recently.  Having hurt my back again, I found it almost impossible to maintain my bike's appearance.  Now with this sturdy and stable jack, I am finally able to wash and detail my bike again, mostly sitting down with the bike raised to a comfortable working height.  Mechanical service and maintenance is still mostly done at the dealer. 
I wish I had purchased this jack years ago, rather than now because of my chronic bad back, because this is a perfect compliment to having a bike that you want to work on, and/or detail to perfection as you keep your bike looking like the day it looked in the Dealer's Showroom.