You can adjust performance (great if you have limited system resources), change the render mode, define custom keyboard shortcuts, set keymapping, fake your GPS location, install Android apps manually (without using the app store), shake the screen, automate mouse and keyboard actions, record the screen, and lots more. This is a beast of a program if you're like me, and you're interested in customizations. There's direct access to the Play Store, so after logging in to your Google account, it'll feel much like you're on an Android tablet: just choose which apps to install, and you'll have them open in no time.
You get the whole operating system as if you were running a tablet right there on the screen. It's ideal for inexperienced and adept emulator users alike. It calls itself 'the most powerful Android emulator,' and I agree. MEmu is an impressive program that deserves a list on any Android emulator list. Must have a premium account for some things.