I recently purchased an old Guitar Hero controller and connected it to RPCS3 emulating Rock Band 3. It worked shockingly well. It felt like playing on a real PS3.
This is a super impressive achievement from the RPCS3 team, because rhythm games are horrible with even a little latency.
I recently installed Clone Hero, with my only PC Guitar Hero-like experience being Frets on Fire probably 15 years ago, and I was blown away by how it felt exactly like Guitar Hero.
FoF felt so clunky whereas Clone Hero is a delight. It handled high FPS well, the song interface looked exactly like Guitar Hero, and the customizability is the icing on top. The community has ported over basically every song from every Rock Band or Guitar Hero game, so there's more than enough content. Clone Hero was so smooth I bought a wireless receiver to use my old Rock Band drums and play with my wife. It's a blast!
I have tried Clone Hero and frankly it drove me to RB3. It’s fine if you just want to shred, but my god that UI is hideous. Zero polish. It absolutely feels like an amateur fan project next to RB3.
This is a super impressive achievement from the RPCS3 team, because rhythm games are horrible with even a little latency.