I've had excellent experience with Crucial for over 15 years, so they were my go-to vendor for this build as well. I was going to get the 2133MHz flavor, but a sale popped up putting the 2400MHz flavor below where the 2133s had been pricing, so I grabbed them. I chose a 4x4 config so that I could take full advantage of the quad-channel memory controller.
Aesthetically beautiful, but functionally boring. I turned on XMP, and it worked, as advertised.
Unfortunately for me, attempts at overclocking and tightening the timings failed miserably. Which is why it only gets 4 stars. I was hoping for a little bit of tweakability, and was surprised to get none. Of course, I could just be bad at tweaking memory, but regardless, a 4/5 seems like a fair rating for a product that did everything that it said it could, but did not exceed expectations.