A:AnswerNot at all. Pretty lightweight for its size. I play several online games and voice is a must so I have these on for many hours on some days and I have no problems with the comfort.
A:AnswerMost headphones don't have this man, but you can always install software that allows you to do this, like OBS (recording software) that allows you to monitor your mic input.
A:AnswerI have used these for 3 months with no issues. My cloud 2 wired set is 1.5 years old and has been abused by my children. They are still looking good.