Okay for daylight shots, but no good for anything slower than 1/15th of a second exposure in my experience as you're still relying on your hand/body to hold it still. Depends what you want to photograph I guess.
I use a monopod everyone and then for wildlife photography or the odd landscape when it's a bit dull. I suppose exploring it would be better than nothing, but as soon a the exposure time gets below 1/30th of a second I'd be using a tripod anyway. They don't weigh that much different tbh and as the photos are a one off more often then not I take them at ISO 100 with exposure times from a couple of seconds to the extreme of 5 minutes in some of the larger mines I've been in.
A monopod would be good for bashing nettles and brambles, far better than a tripod too