First of all this thing is a piece of art. When I first got it I wasn't sure whether to put it on my bike or hang it on my wall. It becomes equally marveling when it comes time to push up that those vertical climbs necessary to get to the epic downhills. Maybe it's just the way that the gearing works out on my bike (32T chainring) or local trails but I found myself running a more consistent gear the whole way up. Also the peace of mind of having that huge granny gear makes it comforting to know you have something to fall back on when you feel like you've got nothing left to give.
This cassette offers smooth shifting over a HUGE spread of gears. It's got a bit more weight to it than the 11spd XX1 cassette I used to run, but the additional range is more than welcomed for a bit more weight. The Black coating seems plenty durable, even when I hardly ever lube the chain.
If you're using anything else you'll definitely feel the shift in quality if you switch to these. Not surprising considering it's SRAM, but this is buttery smooth and changed the way I ride for the better.
The SRAM 12spd Eagle is by far the smoothest shifting Mechanical group on the market. The XO1 Cassette offers up a wide range for us 1X spinners to get up the hill and blaze it back down. I have found that the SRAM XD driver style cassette is also much quieter than the Shimano cassette's during shifting. Step up the plate and hook it up with that 50T goodness.
The Sram Eagle 12 speed drivetrain is mind-blowing and its a great upgrade over sram 11speed drive train. The 50 tooth gear is a real leg saver and allows you to run a bigger chain ring up front. I simply love this cassette!
Eagle 12speed is not what I would call a game changer, but more of an evolution from the original 11speed 1x system from SRAM. The broader gear range that includes the 50t ring in the rear allows me to run a larger ring up front and still have a big bailout gear. The X01 Eagle cassette is the same as the XX1 Eagle version, but does not include a Ti-Nitride coating.