Cutting holes in workpieces using a forstner bit is an efficient way to create nice clean holes effectively and efficiently. But there is a small divot that is left behind, which isn't a big deal. However, if you are wanting a nice smooth bottom hole, then using a trim router, dado clean out bit, and a template will clean up the hole nicely!
To learn more and purchase these Amana Dado Clean Out bits, use this link:
https://thewoodsmithstore.com/product-category/dado-clean-out-bits/