As expected. 11 spd cog and lock ring are inside the package behind everything else. Not Biketiresdirects fault, that's apparently just how SRAM does it to freak people out.
Love the sound it makes as it clinks into the right gear. Definitely louder than Shimano drivetrains which may be a procon depending on your preferences. Works well with my 1x system - no grinding when shifting, no noise when pedaling, just the weight penalty for going with a lower end cassette which only matters if you are a weight weenie or racing at the highest levels.
I bought this cog set for those few rides that I do that have humongous hiills. I always wanted one more gear to get up those higest of inclines. This fits the bill. The price was right. I've used it a couple of times and all is good. I did at one chain length to the chain to accommodate the 36 tooth gear.
I recently purchased a new Cannondale with SRAM WiFli rear deraileur capable of 32 teeth low gear but mine came with a 28 tooth low. I'm fairly experienced with bike maintenance so replacing one cassette with another wasn't a big issue. The price was right (on sale) and I applied earned Credits from previous purchases plus Free Shipping! A great value and I love having that bail out gear here in Sonoma County, CA.
Built up my crud weather commuter bike with Apex 1, and this 10-42 is nice and bombproof. Weighs a ton, but if you expect that, it's a great economical option for large range. The black finish wore off quickly in the grime, but it hasn't been prone to any rust yet.