The Mexico (and Argentina) prices are quite incredible - more than just about any national roaming sim. If it's accurate of course - they may have just misplaced the decimal point.
Coverage in Tokelau is impressive - even gsmworld doesn't know there is a gsm network there...
Why do these roaming sims always get launched by companies with zero knowledge of geography and phone networks, with websites full of errors? Makes it impossible to trust anything they say.
Sims: Telcel MX, T-Mobile US, Virgin Mobile UK, Orange UK, Knowroaming
Voip: Localphone UK, Anveo US, Google Voice