I bought my Mac Book at Best Buy....same computer....same price....but I was told that I was not eligible to take Apple's one on one classes because I didnt buy directly from Apple.
I dont know if there are any stipulations....but as long as you are paying the same price.....go to the souce.
Be careful of buying at "authorized resellers" like Best Buy. Some may have extra conditions in their contract that are more restrictive than others.
As an example, a local Verizon authorized reseller had a clause in their contract that stated that if you terminated the contract early, not only did you pay a fee to Verizon but you also had to pay the authorized reseller an early termination fee.