I don't have the "nano pro" (whatever the heck that means), but my two year old Precip is a good basic reasonably priced PU coated rain jacket. Nicely made. Reasonably moderate weight. Pretty durable. Good all around rain jacket.
The marketing mumbo jumbo is BS. None of these jackets "breathe" under aerobic activity or warm conditions. The PU coating of the PreCip style jackets "doesn't breathe" a little worse than a PU laminated jacket "doesn't breathe", but the end result is pretty much the same in the real world (doesn't breathe). And a PreCip is usually one half to one sixth the price of a laminated rain jacket and will keep you just as dry for several years.
It's light enough to be a backpacking rain jacket. Durable and comfortable enough to be an every day around town rain shell.
I don't believe that a reasonably new PreCip would leak under anything but prolonged exposure to the the worst imaginable conditions. Fully PU coated, fully seam taped. DWR fabric. It's not going to leak in any normal rain conditions.
The jacket has been sold for decades. There are a lot of old ones out there. None of these coatings or laminates last forever. I suspect that leaving them in a hot car kills many of them as high heat is a prime culprit in PU deterioration.