I've used Travelpass for a few Europe/Asia/Australia trips now (although I switched to a local SIM for Australia shortly after arrival). While it's certainly not the cheapest option, it is very convenient, works very well, and is a huge step in the right direction as a value proposition. Color me impressed.
I default to using it now if my trip is less than five days at the main destination, and will consider it for trips over a week for the convenience factor alone.