I really hate it when someone’s practicing and then another violinist comes over and says, “Haha, I played that years ago and it was so easy. Why are you practicing so slowly?” And then they judge by how they sound in the practice room. First of all, no piece is easy. There will always be room for improvement and making it sound better. Also, how can you ever say someone is good or bad at something when they’re practicing? Taking it apart and slowly working the hard spots out is the way to go, not performing the easier parts to impress anyone that might be standing outside of the room. It’s called a practice room and it’s there for a reason. Is there anything wrong with slow practice and actually training yourself properly to play the piece well? I mean, really? What if that person will play much better than you in the future and all you ever did was get the notes right quickly?