So not had a load of time to test it but coming from the CSW 2.5 I'm impressed, I went for the full CSL DD with Boost Kit. Its tiny, well built and is heavier than you'd expect from its size. Having no fan is nice and it doesn't get warm at all so they've done a good job on heat management. Nice to get a very long usb c cable as I can run it easily to both my PC and Xbox.
I've tried it on AMS2 and ACC on the PC and even in compatibility mode (makes the base into a CSW 2.5 from the game prospective until its coded natively) it works very well. It is significantly smoother and consistent than i found the CSW to be with better response and feeling more from the car in terms of feedback. Not had enough time to see if I'm quicker than with the CSW but it definitely feels more consistent.
I've also tried F1 2021 on the Xbox Series X and this is a revelation, it's so much smoother than the CSW and I'm quicker and have more confidence in what the car is doing than before. I'm significantly quicker and more consistent than I've ever been and thats a very big plus in my book.
If I manage to sell my CSW on the upgrade won't have cost me too much and it'll have been well worth it.