Bought a battery grip for my new 80D since I'm used to the size and weight with the grip on my 7D2 and T6s. I have an aftermarket grip made by Neewer on my T6s and a Canon OEM grip on my 7D2, and both match the fit and finish of the cameras perfectly. I considered a Canon grip for the 80D, but based on positive reviews on Amazon I went with the DSTE Pro vertical battery grip for 1/4 of the price of the OEM. It also came with two batteries, making it an even better deal than the Canon. The DSTE grip matches both surface finishes of the camera (flat and grip) and everything is tight fitting and solid.
I certainly understand why people buy OEM grips, but the DSTE grip is a great value and works and looks perfect on the 80D.