Well, one nice thing is that when we do a pex job, we don't have to go back and replace the lines that were ripped out of the ground that night by some low-life, lower than worm-dirt, lazy-butt, jerk-off thief!
The pex pipe itself is pretty reasonable, but the fittings, being brass, are not exactly cheap. . .otoh, nothing in the world of commodity pricing is cheap anymore. . . if the public only knew how high materials really have climbed over the last few years, they'd realize that the cost of EVERYTHING is going to continue to climb as the economy improves, because currently, most of the chain, from manufacturer to dealer, has absorbed a large portion of those cost increases, but at some point down the line, when things are indeed improving for sure, end user costs will have to climb. Sooner or later, companies are going to want to make actual profit again, instead of just being satisfied with keep their employees working and breaking even, IMHO
There is no way I would use copper in anything I plumbed of my own. . . the pex doesn't corrode, it doesn't split if frozen, and it is so easy to make modifications to the system, that I can't imagine wanting to use any other material. Of course, we haven't had problems with our poly in our own home, which has been in for over 20 years, including the year we were in MN during a cold snap, and thinking he was doing us a favor by shutting off the breaker that he thought went to our well, my father-in-law actually shut the breaker off to our heater, ha ha. Walked in the house upon arriving home, and immediately told Larry, "Something's wrong. . it's too cold in here!"
hahahaha good times. . . ice skating in the kitchen, burned up well pump, New Years Eve party planned for the next day. . . . just another one of our mis-adventures with a happy ending.