I am now into sandbox testing and overall the plug in works fine, just one issue with zones.

1. I get the message "Aug-14-2017 09:09:31 (1502694571)
update_status
Module disabled due to zone restriction. Billing address is not within the Payment Zone selected in the module settings."
If I set the zone to "none" then it works OK. I use the same zone definition for the built in PayPal Express Checkout which works fine.