yeah, don't fight little furry teddy bears in two legged walkers and don't fight hotshot pilots in four legged walkers. but you're okay to fight idiotic droids in either.
The Plustech forest walker was pretty cool. I'm sure this has been posted here before though. But they have some videos of it in action. http://web.archive.org/web/20021014095800/http://www.plustech.fi/Walking1.html