I wouldn't call it a mobile antenna, though I suppose you could stick it on top of a truck for transport and set it up in the boonies fairly easily. It is just 4 sections of 10' pipe that sleeve inside one another. You plant the base on a stick of rebar, attach your antenna, and push it up. For long-term mounts you need to ground it properly and guy wire it. To make it an efficient mobile antenna rig might be too much of a pain but it would be possible. I think a loop or inverted L might be the way to go for a good long range mobile antenna. We recently set one of these up in less than an hour at work-including multiple guy wires. It's easy work.
I plan to use it at my home. I live in one of the more elevated areas of town and will be able to hit most areas of the valley from my home with a 5w handheld. When the new Kenwood gets up and running, I will be pushing 50w through an 11dB gain antenna. I can hardly wait.