Fantastic ammo. Gmed recommended them to me for my 20ga Mossberg. They produced a much better overall pattern than the Federal 9s I was using through the same choke. (If you're a numbers guy, I got 232 with the Ninjas but only 165 with the Federals in the 10" circle at 40 yards.)
And I agree with CheaterCopperpot- POI was very different from both loads for me. I use a red dot so just had to make the necessary adjustments but the Ninjas were definitely the better performing load and what I will be moving forward with, only experimenting with different chokes from here on out. Definitely give the Ninjas a try when you can find them in stock. I'm not a big TSS guy in 12ga so can't attest to them there.