Their coverage is constantly improving. They have improved a lot since they started.
As for data roaming, agree that 1Gb not enough if you visit the country frequently. If you need more data, you can top up $4/GB into your account. My advise is to download offline maps before you go into the country so you save data on Google maps loading. Save the data for communications and Web surfing instead
Someone I know who uses SIMBA $10 plan -- went overseas sometime ago.
I was told by this person -- the trip last about 5days from 24th to 28th.
This person's SIMBA 30day cycle for that month -- happens to be renewed on 26th.
So...
From 24th to 25th, this person has 1GB FREE roaming data and...
From 26th to 28th, this person has ANOTHER FREE 1GB roaming data (due to renewal of next 30day cycle).
This person uses 0.3GB - 0.7GB mobile data each day during the trip.
In total for the entire trip -- about 2.3GB mobile data was used.
For excess data charges, SIMBA charged $4/GB for that particular country -- and
charges by per 10MB used.
So for the 5day trip, excess mobile data charges -- deducted from SIMBA account was just: (2.3GB - 2GB) = 0.3GB x $4/GB =
$1.20
Even this person is surprised -- by the low cost occurred for mobile data usage for the trip.