I've really enjoyed their work. I don't really need another Beethoven cycle (in fact, I just purchased the Miro cycle in 24/96 stereo, as mentioned), but I might buy it as a bundle when done anyway.
If you haven't bought it yet, they've just put it on sale for 11.50 USD:
https://www.eclassical.com/beethoven-string-quartets-op-18-vol-1-1.html
(I'm gonna pass, since I just shelled out for the Prokofiev bundle. And I'm happy with my Quartetto di Crimona set on Audite...)