I'm with Tello, which has no international calls or data, and my wife is with Mint, which has a prepaid (really expensive) option for small amounts of credit. We're planning to go to Canada for a day or two, and I was planning on (ab)using the 7-day trial.
I plan to do other international trips, and getting Fi for a month or so each time was the plan. But if they suck, maybe I'll try something else for this trip.
Airalo looks decent ($6 for 1GB in Canada is reasonable). Thanks for the tip!