My P-Mags have been flawless, per the usual.
I haven't had a chance to mess with my new E-Lander mags yet, but my initial impression has been that they are extremely nice. I was pleasantly surprised when I got them to see how nice they actually are.
Went through all six eLander mags. Each inserts and drops free empty with no issues. With 30 rounds they do not want to seat on a closed bolt, cut back to 28 and no problem. Typical of USGI mags also. They do seem to have very stiff springs which is not a problem, they feed well. Are they better than USGI mags with the green follower? Probably not although they are steel so they probably can take a lot of abuse. With PMag prices out of control (I saw a lot of ten on eBay for 825!) they are a good alternative if you need mags until PMags start flowing again at realistic prices.
Realistic prices for PMAG is $14.99 each. Until then ya'll can have all the $825.00 mags you want.