Even though ,
iPayYou doesn't look as good as other services such as Bitpay for example , they managed to make Starbucks accepting bitcoin in
their official application and that's definitly an achievement for a new service like them.
In order to use this feature , you first have a wallet in iPayYou otherwise It's not going to work. The next year already sound very promising and I can't wait to see more .
Ipayyou is not a popular service but with starbucks they might get into mainstream,I think this is a new service and they might incorporate many service in the future,who knows Mcdonald might be added soon or many popular fastfood and cuisine.
I think this step is mutually beneficial, perhaps this is a subsidiary of starbucks. But we must appreciated this step for make bitcoin more popular again.