I do like using them from time to time. A few playmates use them and truth be told they make it more enjoyable😉. I am however a sucker for PA's and yep pun also intended.
a properly fitted one can engorge the helmet somewhat and make the veins more pronounce adding to the pleasure of both. Though in saying that extensive use can damage one's little mate and have him, not perform as he should.
I use them regularly, a heavy one around my cock and balls and another around my shaft. They help me stay nice and hard for as long as possible, I do find that when I finally cum my ejeculation is a a little delayed but flows so well