MK seem to improve with every release and KLGA is arguably their best work yet. Incredible detail, inside and out, plus a good deal of work out on the runway approaches to boost the immersion when on finals. Unfortunately, KLGA is situated in what is undoubtedly the sim's most demanding area, so smooth performance isn't really a possibility, even for those with top-end machines (like me). I can get decent performance (using quite heavy FSLTL traffic plus third-party KEWR/KJFK) but I have to drop my TLOD significantly each time I fly into/out of here. It must be borne in mind, though, that this isn't the fault of MK.
Highly recommended, but only if you have a machine capable of getting the most out of the heavy NYC area.