I speed run Zelda 2, though using an SNES controller. My experience with 8BitDo controllers is that they're stiffer than OEM, especially with the d-pad arrow keys. If you can use the analog inputs, they're great -- I use a Pro 2 with my Switch all the time. The d-pad, though, is a deal-breaker for classic gaming. iBuffalo used to make a controller that really did feel like OEM, but they've been out of the business for a few years.