I've got the red sears one and other than having to use the Dyna adapter it's been well worth the money. I dont use one every day but my bike sits out the winter on one. I got no problem recommending the sears to anyone for light work, but if you like turning wrenchs alot then get a J&S.

 

I've got the yellow H-F jack and it's worked great. I can jack the bike up, climb on it, etc. and I've never tied it down. My bike hasn't fallen off, the house hasn't caught fire, I haven't contracted an STD, cats and dogs haven't started co-habitating in the neighborhood, etc. I'm sure the J&S and Pitbull are great, and I'd love to have one if someone paid for it, but mine has done everything I've needed it to...

 

Had the sears yellow. Worked great on my sportster with the straps. Got my Dyna and found out it didn't work without the adapters. I was a nervous wreck trying to get it on the jack using the adapters when doing so myself. Was easier if I had an assistant so I could make sure the adapters didn't shift. Bought the J&S and now I'm never nervous. For my piece of mind it was worth it, although I can see why some wouild disagree ($$$$$$).