I can only speak specifically for the Condor MOPC carrier, but I wouldn't touch it unless you're pushing 300 lbs.
The plate pocket is giant, and the strap holding the plate in position isn't sufficient. Ran about 150 ft and ended up with my plate sideways by about 30 degrees.
The sizing on the cummerbund was crazy big. I'm a fat guy (38" waist, 40" chest), and I had to pull the cummerbund as tight as it would go, and the shoulder straps are so long that I've got 4" of extra webbing hanging off getting in the way.
For really limited use on a really tight budget, some of the cheaper Condor PC's might make sense (Sentry, Compact/Urban), but I'd stay away from the MOPC and Gunner.