That looks pretty sharp to me!
Do you mind me asking whether this is an out of camera jpeg or did you develop it from the RAW file?
If out of camera jpeg, what camera settings did you use e.g. ALO, HTP, NR etc?
If developed from RAW, what was your workflow e.g. DPP, LR4, CS5 etc?
I only ask because many early adopters, myself included, have been having concerns about IQ.