Has anyone heard of either telecom business? There was a thread about cheap prepaid cell plans and STI Mobile has one of the better deals. It uses the Sprint PCS network, but STI is owned by Telco Group, an international carrier.

I am currently using AT&T and think the coverage, quality, and overall plan sucks the big one.
I want to switch and STI looks like the best way to go, assuming it does not go belly up or start changing its policies left/right like AT&T when Cingular took over (they made some changes to the prepaid service as soon as Cingular was on board).