Mine were awful too (Weise).I put up with it for 2 years then realised I was a fat bastard and lost weight. They're great now, although seem to be pretty optimistic on the sizing... The 40 trousers I bought were smaller than the size (uk) 38 Hein Gerick 2 piece I had. H
The problem with my current set is across the chest, bought to fit snuggly on the basis they'd give (I should know never listen to a sales person as I am one lol) but they haven't and when I put my back protector on they are uncomfortable as the leather is still very stiff and there's no give at all.