In reply to Yorkieboy:
I got a Momentum last year as my back-up harness. It feels OK as a backup, but it has spent most of it's life in the cupboard. The issue was the BD TrakFIT leg loops. It introduces too much extra looseness to the harness.
When belaying, it feels like your belay device is up at your face. When hanging around on the rope taking a rest/being lowered, it's as if your knot is almost above you. This may of course just be because I've got skinny legs!!
I'd definitely stick to fixed leg loops like the BD Ozone/Chaos, or fully adjustable like the Aspect.
You could always go for the Petzl Adjama - on the Bananafingers site for £44 (last seasons). It looks like a good match for the Momentum in price