the adapter for the controller doesn’t work with the PS2 guitar on guitar hero 3 and I want to battle with friends on GH3.
hell, tell me if there is another brand for the controller adapter other than NYKO.

I just bought a new guitar off a trusted online website. My old guitar was given to me so I’m not sure what next. I have been told that I have to tweak it and such before playing, I just have not been told how. Also is there anything else? Like should I use fretboard conditioner on it? Anything you can think of would be helpful.

I am trying to buy a Fender Stratocaster.
Is it better if I get this at Best Buy for $199.99?
Or get it from Guitar World, Sam Ash, Guitar Center, etc.?
If there is a difference, please explain it to me.