My own experience with ARC was completely negative.
I ordered quite a number of things, amongst which some books and slitting saws. When the order arrived the books and slitting saws were nowhere to be found.
I called ARC about the missing items and was informed that I must have inadvertently thrown out said items with the packing materials. All of the original boxes and packing materials were still in my possession, but there was nothing to be found therein.
After some amount of back-and-forth about me complaint, ARC finally (and very reluctantly) agreed to refund the money for the missing items. However, I was informed that I was “no longer a valued customer” and that they would no longer accept my trade.
The translation of that phrase – "no longer a valued customer " – appeared to mean, ‘How dare you have the temerity to call us out on our own screw-up?’
Note: Ever since that time I make videos of myself opening packages as proof if needed in future discussions.