At the price Noctua is asking... this is practically DOA against the Silver Soul 135 which, you guessed it, is 135mm tall and also packs a 120mm fan, not to mention a tag under $60.
At least it's a second valid option for anyone using the 280x case and wanting to go air.
DOA
......... the D12L is packing one less heatpipe but also has more height and more heatsink mass in both dimensions. And also as a D9L owner, heatsink mass definitely matters.
Only place to reliably find Silver Soul are places like Taobao and Aliexpress. And at that price the Noctua becomes the steal ($41 shipping anyone?). Noctua coolers I can always find locally on 1st-party Amazon or Newegg, not marked up unless it's a U12A Chromax.
And the SS135 is not some revolutionary messiah. Performance-wise it's just a scaled-up D9L, and didn't end up beating my C14S setup, which is itself barely better than a U12S. Unless you just *have* to have your windowed panel on NR200/NCASE/Cerberus
Regardless, both coolers have the same problems. You basically are stuck with one fan. They don't give you regular square clips (I bruteforced a pair of P12 redux on with stock SS135 clips). And even if you have clips, your second fan either sits on top of the RAM or the VRM heatsink, which prevents the side panel from going on. And if you have the clearance for it not to be a problem, there was no reason to use a D12L/SS135 in the first place......etc
Going back to C14S soon, so might pick up one of these if only for curiosity. But like the SS135, it won't cool my B-die, so who knows if I'll even try.