A number of my past dive buddies have used DUI suits and had nothing but cost issues with them. Regardless, the zippers, valves and seals are the key...the rest is essentially just a bag with feet.
I'm still in a semi-dry (aka "slightly less wet") suit, but haven't been under for a few years.
Check out Dive Rite for other gear...great stuff!! I'm big on things that be easily maintained and repaired, so their stuff fits the bill.
Beyond this, where there is no memory, the countryside lies vacant. -Indra Kagis McEwan