Four perimeter air chambers is fairly standard, I don't know how their three are arranged, but I'm not sure that it makes a whole lotta difference - but it does save $$. I do like the idea of a 111 lb 14' raft brand new for $3,200. And urethane as a material is proven bomber. The seams are welded (called and checked).
Their site says a 5 yr private warranty and three years commercial - a lot less than AIRE offers or what NRS gives it's high end boats, but others like Hyside offer 5 year limited warranties even on their high end outfitter pro boats, Maravia also offers a 5 year warranty, SOTAR does 6. So 5 years isn't really out of the ordinary - it's also the same warranty that NRS offers for their Otter line of rafts. You also have to figure in the cost of the warranty in the boats price - longer warranties cost the company more $$ which means more expensive boats.
If I was in the market for a new raft - the price point, weight and materials on this boat would make it a serious contender for me.