It's adequate in their mapped service coverage areas - but if you go into any kind of sizable building, expect reception to go way down.

There are plenty of businesses nearby where I'll have a full signal outside, but once I'm indoors it drops off to Edge network.

There are also blank spots of little to no data coverage that have no reasonable explanation.

That said, I'm aware of this and think it's worth the trade-off. I'm not going to another network anytime soon.