I had few problems in Argentina and Uruguay (only countries I've been to since I got it, but been to several times). In the norhern part of Argentina (Iguazu) I had poor coverage where my girlfriend had (Argentinian service provider) great coverage. I think Fi was trying to decide if I was in Brazil or Argentina and that was messing me up. In Buenos Aires (where I spent most of my time), reception was good except for around some buildings (assuming line-of-sight issues). In Uruguay I never had any problems.
The only other issues were a lag between landing and service beginning. Took over half an hour on one trip, and over an hour on another. But this year I didn't have that lag, took maybe 5 minutes from when I turned on the phone after landing to it working.
Service speed was always good.
NB: I have a Nexus 5X. Some of the reception issues may have just been reception issues with that device compared to others, I don't know.
Great in my experience (Austria, Germany, Switzerland, France, UK, Canada, Thailand, South Korea). I found it to always be fast with no obvious throttling, and coverage is often better overseas than at home.
The only other issues were a lag between landing and service beginning. Took over half an hour on one trip, and over an hour on another. But this year I didn't have that lag, took maybe 5 minutes from when I turned on the phone after landing to it working.
Service speed was always good.
NB: I have a Nexus 5X. Some of the reception issues may have just been reception issues with that device compared to others, I don't know.