My opinion of Lang Lang is very complicated. He is a young virtuoso with impeccable clarity and technique. I have seen him live, and he performs very clearly and with refined pianism. His playing is clean and accurate, no question about it. However, the problem lies with Lang Lang's interpretation. He isn't mature enough to interpret music correctly. Many people know this and criticize him for it, and revere Yundi Li as an alternative. Lang Lang lacks the musical experience and maturity to properly interpret certain styles, and I hope he doesn't try to interpret late Beethoven or the Liszt sonata. That said, however, his interpretations of Russian music are much more fitting. Typically Russian music is more free-spirited and flamboyant than its German counterpart. While his Rachmaninoff is decently-interpreted, his Scriabin is worth mentioning.
Lang Lang interprets Scriabin like no other. There are good and bad things to this. He is so unsure of himself musically that his Scriabin etudes are mere guesswork. Compare his recordings to the great Scriabin legends of Sofronitsky, Horowitz, and even Kissin. Case in point, his uncertainty actually leads him to play Scriabin in a very unique and interesting style. He plays it schizophrenically, which may be appropriate - Scriabin, though brilliant, was crazy (hypochondria and synaesthesia being the smallest examples). Lang Lang's "guesswork" actually works out in these etudes, because they are young, showy pieces, so the schizophrenic, unsure interpretation works out nicely for him. However I think Lang Lang would poorly interpret late Scriabin as it is very mature and atonal.
If you are looking to purchase this CD, let me give you a good summary. The Rach Concerto 3 is well done, clean and accurate, but nothing spectacular: don't expect a 1951 Horowitz recording here, just a clean and accurate recording. The Scriabin etudes are fascinating to listen to and showcase a very interesting interpretation that surpringly works (his Op. 8/3 and 65/3 are unparalleled in my opinion).
Unlike a few others, I have no problems with sound quality. The sound is crystal clear, what I would expect from a modern recording like this. Good luck in your purchasing endeavours!