CelTrek - a new int'l SIM

[GadgetKen]

Considering getting one of the CelTrek cards to supplement my United Mobile card. CelTrek rates look like they vary quite a bit from country to country. Interested in the low Bahamas rate. The CelTrek site also mentions in their FAQ's that data will be offered in 2q07. Data isn't offered on many prepaid international cards (off the top of my head I think Mobal and GT-Sim), so this would be a real plus if and when they offer it.

Some questions on their service when you have a chance:

Do they have reliable customer service (wouldn't want a Yackie like experience)?
Any additional charges for the US dial-in number that they don't mention on their website(is there a monthly or annual charge for it)?
Do incoming calls work reliably, and is the call quality good?
Are card refills relatively glitch-free?
If you use data once they offer it, can you let us know your impressions of ease of setup and use, and data rates?

Thanks!