I use a 7 bbl JVNW system that was originally installed in 1997. I'm very happy with it with the exception of the shadowless manway doors on the unitanks and brite tanks. There is a support piece that's part of the door which bends over time and must be cut apart and rewelded periodically (or in some cases replaced altogether for about $200). Other than that it's a great system. I'm up in Lake Placid and you're welcome to come check it out if you want to see how the system works in action.
Brooklyn Brewery at the Culinary Institute of America
Hyde Park, NY