I have had a P 415 -16-P9SX upper on an LMT Defender lower for about 2 years now. Overall I like it. It's very accurate, and stone reliable (but no more so than my BCM AR). I have about 3000 rounds of mixed ammo through it as well as at least 5000 rimfire via a converter. I can't find any ammo, brass or steel case, that it won't shoot. If you give it ammo it likes it is easily capable of sub moa 5 shot groups. the receiver and BCG are cleaner after 1000 rounds than a DI AR's is after 100. All of the components, coatings and assembly are top notch with many interesting innovations.
However, in my opinion, it is not an AR. While it has many parts in common with an AR, there are significant enough differences in parts, functioning principles, and wear patterns that it is a totally different rifle. Because of this it not in the same league as a battle proven for 40+ years, known commodity rifle like an AR built to Colt or BCM standard. The crucible of history has shown us exactly where when and how AR's function, wear, fail and the performance envelope in which they thrive. It is this pedigree that is the most valuable part of AR ownership. Also, I find some comfort in the almost universal availability of every single operating part for my AR. The OP mentioned how many Colts are out there as compared to POF. What do you do for bolt carriers, op rods, pistons etc. if POF goes out of business?
So, while my POF is real cool with lots of neat and innovative features and shoots great it's to small a sample for me to consider it my "go to" rifle in a SHTF scenario.
My advice is this: Buy the Colt. (before you do, give a long hard look at BCM) Especially if its your first AR. Shoot it and learn it inside and out. Then, if you still want a POF go for it they are great rifles in their own right.