Preserves are great. You can keep them forever, put them on toast, and pair them well with peanut butter.
This is not that type of preserve, but I would still eat toast on it, pair it with peanut butter, and I hope it lasts forever.
I don't know how many miles of trails are in the preserve, but there have to be thousands. The Piestawa summit is by far the most popular, but there are many better hikes to be had. My recent favorite in the 8B to the 202 to the 200 to the 303 loop. 5.1 miles of unparalleled views in near solitude. It doesn't get much better.
PMP is a testament to excellent urban planning. Well played, Phoenix.
Pros: a vast, untouched wilderness preserve
Cons: sometimes parking is a little sparse