I got this deal but note the 1Gb is in a set of 53 countries not including the US. I couldn't get it to work in my US location (wouldn't connect), but their support via WhatsApp was pretty responsive let me know.

I'll admit I didn't even check the coverage which is plainly shown on the promo page linked above, and I don't mind too much because they have pretty cheap, tiny packages (e.g. $2.50 for 100 Mb) which is fine for me for a transit/stopover to check a bit of email between hotspots.

But, caveat emptor.

Edited to add - shipping took about 10 days to arrive in the Eastern US.