Yea that's as plug and play as you can get. Adding an aftermarket one is more work. Especially if you want it in the cluster. You will have to cut out sections of the cluster for it to fit, run more wiring then needed for the factory swap, provide power, ground, and backlight signal. Not to mention finding a gauge that you like and fits there.
Trust me, I have a aftermarket tach too, mounted to the steering column. It's ok for now and works but one day I'm getting a whole new cluster from Dakota Digital.
Trust us, you will be pretty happy with a cluster swap.