JB4 questions for my 2015 550ix

I just leased this car for 36 months.



I just had a few questions about the JB4.



1. Does anyone have any data on 0-60 time differences, etc for this years model?



2. For anyone who has done it, instead of numbers, in words. How would you describe the way the car drives?



3. How much time does it take for someone who isn't super mechanically inclined to take it off without a trace when taking the car in for service?



4. I have seen some people say that no matter what you do, when they read the codes on your computer they can technically figure out it has been tuned in the past. What are the real chances of losing your warranty?



5. Would anything else need to be purchased other than this: LINK? Or does this not fit the 2015 model?



6. If I plan to never run anything other than 93 octane, will i still see significant gains?



7. Everyone seems to say to just skip stage 1 and go straight to stage 2. Opinions on this?



Thanks for any advice