Purchased the $10 3GB Western Europe regional SIM for a family trip to Spain and Portugal. The service was almost flawless but for one minor blip. I emailed customer service and got a response within 5 minutes. Prior to my purchase I also interacted with customer service and they were equally prompt and helpful.
The 3 GB was perfect for our 9 day trip and covered us when not on hotel wifi. Also, we did not suffer with the absence of cell service or SMS texting, because Whatsapp (to call most family/friends who use that) and Skype (to call others, or businesses who are not on WhatsApp) fulfilled this need, and both work over this app and over hotel wifi.
Some advice:
1) read the extremely well-written and helpful FAQ short articles on their website.
2)(my only blip) in Settings, Cellular, SIMs, Select this app, Cellular Data Network, be sure that ‘this app ’ (all lowercase) is entered in the APN field for BOTH cellular data AND LTE.
This should happen automatically upon installation but because the technology is new, sometimes this does not occur and so it must be done manually.
Bravo this app!!! A++++++