I travel a lot for work, so international data is important to me. The price of roaming is ludicrous and Wi-Fi hopping isn't an option. There are travel SIMS, but buying a new one for each country is annoying and I tend to lose them easily between trips.
Because of my diva-level data requirements, I tried a KnowRoaming SIM sticker on a recent trip to India. And I was genuinely surprised by how great it was.