From dpreview.com (Digital Photography Review):
One of our favorite DSLRs in the past few years is the Nikon D7100, which was introduced way back in February 2013. The D7200 isn't a radical upgrade by any means, yet it still adds some important features, most notably a larger buffer, improved autofocus performance in low light, 60p video, Wi-Fi with NFC, and 15% better battery life.
Full review, from this past June, here. Lots of D7100-D7200 comparisons. Gets an 84% rating overall, which is very good from them. Loses points mostly on video mode and connectivity. Their summary:
The D7200 is a gentle refresh of an excellent camera. The sensor sees improvements in dynamic range, AF works in lower light and the continuous shooting buffer lets you make use of its class-leading subject tracking. The slow live view autofocus and awkward lack of aperture control during movie shooting means it's not as flexible as some of its rivals but it's a formidable DSLR for stills work.