I know that other topics have covered the fact that chosen retailers cannot be changed, but this is a different topic.
The point of this topic is to highlight the need to have this feature included as soon as possible. I imagine that as Curve grows, so will the list of retailers. Additionally, circumstances change. Nearby stores may close down, for example.
Therefore having a one-time choice puts us - the customers - at a disadvantage. I am very pleased with Curve and I think that this is one of the few areas left to make this service one that deserves a 5* rating.