I use an Ultra Noc and have been for over a year, in that year i have shot more than 1000 arrowns with aboslutely no issues, just a little wear on my release but not much.Have not had any issues with my string or servicings at all. The only reasonsomeone string should break at theNoc would be if the tech who put it on, screwed it on way to tight.ULtra Nocs should never be under or over tightend. I love my ultra noc, never tried a string loop nor do i think i will.