I use it loads. Only problem i've had was once when it said that the order may not have gone through that i should ring the store. I called them and they said it was because i ordered something that they'd ran out of, so i swapped it for something else and it was all good .
Once or twice to pay by card for takeaway which don't take it over the phone but what I usually do is decide what I'm eating on there and phone the takeaway directly. Takeaway doesn't get the commision ripped off them then, and if you're nice in the phone sometimes you can get free stuff.