Our tanks worked great, they just leaked!
I'm hoping Keystone will or has addressed this issue. When we see how the tanks are installed, read the instructions on how they should be installed, and think about the weight of almost 40 gallons of liquids, it's pretty easy to understand the failures. That's not even mentioning the stress some of the plumbing puts on the tanks.
If I were serious about another Keystone product, I would have a little discussion with "team Montana" or someone higher up about the tanks. There is simply no excuse to allow a problem to continue. JMHO