Liquidium,

We've mentioned some of the dangers (kickback, jack sway and also lifting on unstable footings).

It's also limited (my 48" unit) because in some off road situations, it's not long enough. Then you need to use something like a rock underneath <img src="/forums/images/graemlins/frown.gif" alt="" /> which is especially dangerous.

One other thing that I didn't mention yet is that it can mar the finish of your bumper which you may or may not be concerned about.

Regarding vehicle recovery, try what doug did but instead find the biggest piece of firewood you can (at least 6" in dia) and hilift uphill over that with your tires at 15psi. They you'll know what lloyd is talking about. It's not easy

Also, it's limited in the kind of lifting it can do... It will mar or worse, dent a stock bumper if you're not careful (one of the reason's I'm glad I've got custom bumpers). It's difficult & potentially dangerous to use to lift from the side without strong nerfs.