I have two cheapy jacks . the Harbor Frieght yellow lift . $59+ Tax and a blackwidow sissor jack .was about $65 plus shipping

 

I love my Pitbull Dyna model. I will admit the deciding factor was the extra lift height and I am so glad I didn't let my normal cheap ways win over. I spent a little extra and paid for the extra height, handle (comes with Pitbull) and grease zerks.

I know both Pitbull and J&S are great and you can't go wrong with either, but I listed a few things that made it worth the extra price for the Pitbull IMO.

http://www.flickr.com/photos/50034596@N02/6731611741/http://www.flickr.com/photos/50034596@N02/6731611741/ by http://www.flickr.com/people/50034596@N02/, on Flickr

 

Three years on my J&S and it's a great tool. Used for maint & installations and storeage too.

 

I found a Pitbull on Craigslist for less than half-price. The dude said he was embarrassed as he had used the lift exactly once. Tried it on my Road King and I must say it is a great jack. Got the T-handle as part of the deal as this was the touring model lift.

Buddy of mine has the J&S. I will also say that it is a great jack as well. We used it first to do the fluids on my bike. His UC is still in warranty, so he's not changing fluids yet, but uses it for other needs (cleaning, showing off, etc.)

 

Love my J&S jack. Never work on or clean my bike without it.

 

I've been using my Harbor Freight Yellow jack for over 4 years.
No problems and I've never had a bike fall off.

I do strap it down if I'm going to be doing any serious wrenching on the bike.
If I'm using it for washing or just some quick work I don't even strap it down.

I've also climbed on the bike while on the jack and pushed it around the garage with the bike on it.

It's not near the quality of a J&S but seems to work great for me.
Plus it almost $400 cheaper.