The main thing is that the commission does not cost more than the order. Yes, and wait for confirmation of the BTC for a long time a dubious pleasure.
Exactly waiting for the operation is not too happy. It's not interesting for me to wait in the restaurant for several hours until payment arrives, if I'm very hungry.
I agree with this. Customer won't be happy waiting the network confirmation.
Not to mention the cost paying with bitcoin is high right now.
To get transaction confirmed within few block cost 0.0013