I have a 1st gen MOLLE FLC with the smaller 3 inch belt...I know alot of people whine about it being flimsy and not sturdy enough, but from MY OWN experience, I have beat the hell out of a MOLLE FLC and have had no failures...and I mean beat the hell out of it...
I love the modular setup, the pouches are secure and sturdy. Not only can you use the pouches made by SDS, but there are alot of other vendors like, Spec-Ops brand, Tactical Tailor, Blackhawk, ect..that makes MOLLE compatible pouches and gear...I built my vest set-up by getting the FLC and belt on ebay and the pouches direct from SDS, except the 2 Spec-Ops brand 6 mag pouches I use for cargo,...I have 4 double mag pouches, 2 single pouches, a buttpack (which I'm trying to sell), 2 canteen pouches. Total, about $120 in the setup...
I plan on getting a MOLLE II FLC, it does away with the belt, because I like the inside pockets that they had put in it....