Nice implementation. Though I wish they would address the issue with CCV validation. If you use the test card 4000000000000101 which will fail the CCV check,

Nice implementation. Though I wish they would address the issue with CCV validation. If you use the test card 4000000000000101 which will fail the CCV check, you still get back a valid token. There doesn't appear to be any way to configure their API to reject a token request with an invalid CCV short of creating a customer record for each request.