Excellent Internet data offering for overseas travelers

Had my first experience of Flexiroam in several European countries recently, allowing me to use internet service overseas at a reasonable rate whilst still keeping my current sim card, phone number etc. (by sticking another sim over current SIM). Excellent and easily accessed service, and worked seamlessly. Found this to be an invaluable service and was exactly what I hoped to find. Haven't yet tried the call functionality but appears to be a good addition to the data (although I use FaceTime, WhatsApp phone, Skype etc.).

One of those products that will be significant if given opportunity and sufficient exposure