The D5300 offers a few performance improvements over the D5200. It also adds some compelling features that competing products like the Canon T5i don't have, such as 1080p/60 fps video capture and built-in GPS and Wi-Fi.
Easy to handle and use; Captured images have plenty of detail and accurate color; Built-in GPS; High ISO capability
18-140mm kit lens is rather large and loses fine detail; Some controls are oddly placed; Noise reduction can be overly aggressive