After shooting a bow for 29 years, I am now using my first string loop and so far I really like it, although I am still weary of them breaking..........its a personal thing. I went with a very small loop on my Bowtech so that I could make very small changes in my draw length because the modular on my Patriot was a 1/2" short for me and I wanted to try a loop. I think they are really necessary on a shorter axel-to-axel bow. No nock pinch and easier on your string/serving. Some guys say they are more accurate as well(I haven't found that out yet). Brass nocks work well, but if you a lot of adjusting you need to be careful. I've cut a few servings trying to loosen brass nocks.

I am sure you will get comments from more experienced loop users who prefer them over brass nocks.