just a warning for those who got the free nikon bag, i used it today to carry my gear. it wasn't overloaded, just 2 lens and the d750. i got a fright of my life when i picked up the bag and one end of the strap suddenly disconnected from the bag. i don't know how it happened as the strap clips were working properly after i examined them. good thing the bag did not fall to the floor as i was still holding the strap. i don't know if this is a design error or what, just be careful with using this.
i found the bag uncomfortable to use as i had around 4kg of gear. the shoulder padding was cutting through my shoulders. this is my first time using a shoulder bag to carry my gears, so i may have been spoiled by the well padded and balanced backpack. i wished the nikon bag had a couple of elastic side pockets for water bottle and umbrella though.
i wonder why canon can give away crumpler bags while nikon gives away some no-name bag. aren't they afraid it would taint their brand?