The good is that he won the match and is into the semi finals.
The bad was that was probably his most disappointing performance for a long time (he probably played better in the Verdasco loss - we'd be looking back to Lu at the Olympics perhaps for a similar performance) - and yet I never really had any doubts that he wouldn't win the match.
He just looked tired on court, the serve and groundstrokes seem to be lacking any power to them, and he wasn't his usual self - presume the virus had caught up with him.
At least he's got a day off before the semi-final (although a doubles match later today probably isn't what he needs)
I have to say I did have doubts that he would win, if it went to a third set - he looked to have about as much energy as I have, and believe me, that isn't much!