In reply to cuppatea:
I'm a Luddite.
I use a Metolius Safetech harness for several reasons.
Firstly, it's got an adjustable raise (i.e. the distance between the leg loops and the waist belt can be changed).
Secondly, it's got adjsutable leg loops and it's comfortable - summer or winter.
Thirdly, everything (including gear loops and the elastic at the back) has got a serious strength rating and it's got a double back buckle.
Finally, it weighs much the same as any other harness.