On my vehicle (1984 fullsize 4x4 Blazer) I don't have, nor do I want them.
On a truck my dad is basically giving me, there will be a pair on there, against my will.
Here's the story. My mom bought a 1995 Jeep Wrangler new in the fall of 1994. She had it for about 2 years and had nerf bars installed at the dealership. Come time to get a new Jeep (a 1997 model) the dealership told her there would be no value given for the bars, so they came off. They wouldn't fit on the new jeep (1997 was the newer body style) so they sat on a shelf at our farm for 9 years before my dad got a 1994 Dodge 4x4 3500 really cheap this July. This ton truck has some hieght to it. Sure enough, my mom came down to take a look at it and complained about how hard it is to get in (she's 5'5"ish). Sure enough, my dad whips out the welder and some steel plate, and throws those suckers on there. I bitched about them the whole time. I still don't like them, but since he is practically giving me the truck, and he worked really hard putting them on, I've been keeping my mouth shut.
Are they functional? Sure.
Would I survive without them? Without a doubt.
I don't do the same sort of serious 4x4ing that some guys do, but I do like to get out in the field and get a little rowdy from time to time. I don't think I'll have to worry about these hanging up.
Anymore, 4x4 is more of a tool, not much of a toy anymore. I use it when I need it.
WIZZO