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:
For a string player, Beethoven’s 16 quartets are of an importance similar to that of his sonatas to a pianist, or his symphonies to a conductor. As a body they form the
(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...)