Here is the deal with the numbers.  We have over 20 providers for our numbers.  We now only have two levels silver and platinum.  All the numbers operate the same.  The difference is, the silver carriers are typically the larger more common carriers like the ones Google Voice uses.  The platinum ones are smaller companies with a much smaller footprint.  If Craigslist decides to block the carrier that provides Google Voices numbers, our numbers will get banned as well.  There is very little chance of the Platinum numbers having this problem because they are smaller carriers.  If a platinum carrier doesnt work, we will give you credit for the number.  The Silver numbers should work but for the reasons I explained if they dont, we would not guarantee them.