I've been a delivery customer for a few years. I agree that their skim milk is the best because it doesn't taste "thin". The only milk I drink is skim, so to me it's worth the splurge.
I also appreciate their excellent customer service. I'm a fan of companies that allow you to talk to a human. It's very easy to put your delivery on hold if you'll be out of town, change your order etc.
Also, remember the hot weather warning posted above and this cold weather warning as well. It we're having extreme cold, the bottles can freeze and crack; a huge mess. (If that happens, as it did to me a few years ago, they will bring a new cooler and new milk). This year, I missed two deliveries because of the cold, but I don't consider that a problem.