Having read the rave reviews, and though possessing a very serviceable White Label/Bartok Quartet version of the Debussy/Ravel/Dvorak quartets, I gave in to the excitement and purchased the Ebene's recording - and the Faure instead of the Dvorak was a nice touch.
On first listening, and thereafter, I detected scattered extra-musical 'boomy thumping', though largely in the Ravel & Debussy quartets. In addition there were rather too noticeable (though fortunately, very occasional) sharp intakes of breath (and the Ebenes really are too young for this affectation). However, it is the 'thumping' that worries me. I can hardly believe that it is a pressing fault, but is perhaps the result of over-close miking and poor-ish editing. However, after a time it becomes aurally uncomfortable and thereby interferes markedly with the enjoyment of an otherwise superlative performance/recording.