I really answer for the bits, never purchased any from Amazon. I would think though, they would be no different than if you purchased from a normal retailer such as Rocklers, Woodcraft, just to name a few. I did purchase both of my Makita 3812C's through Amazon, and no issues with them. I do share one in the my OP table with 1 of my craftsmen routers too.
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"Whether active duty, retired, national guard or reserve - is someone who, at one point in their life, wrote a blank check made payable to "The United States of America", for an amount of "up to and including my life". That is HONOR, and there are way too many people in this country who no longer understand it." -Author Unknown