I can vouch for the 12 speed (I assume 11-speed is about the same construction and quality) TRS+ and the Helix. Both are great and I love the 9-50 range that I get. They are easy to put on an XD Driver (no worries of cross threading), and I have put about 1000 miles on one set, and I just replaced the Aluminum cogs (the steel are still in great shape). I am currently using the TRS+ steel and have the new Helix Aluminums (I dont notice any difference). Some are saying they are not as durable... it is probably just a luck / perception thing.. I had a Sram XO1 Eagle and within 4 mo 2 of the teeth on the 50+ cog broke, my E13 are still going strong. Given the price point I'll be buying them again. Side note.... I ride mostly XC... no enduro, so I have never smashed them on rocks... and I dont do jumps etc.... so its mostly wear from riding.