How does it compare to a new IBM Model M? I bought one from this person used and it was my first one so I wasn't too sure on the spring tension. However, I have noticed that the bracket key has a much louder clack than any of the other keys, including the function keys and the print screen section and the insert/delete/home, etc. I'm not sure if I should buy a new one or not, but I do want the full Model M experience.