I think this weeks San Pedro newspaper shows a $90BZ package of some kind
Yes, but they don't mention that you also have to buy the dongle for Bz$185. I know - I went into SMART to sign up.
As to signal strength, I find Digicell reliable when away from buildings, such as out on the water, but in town there are some dead areas. I only bought a SMART phone in addition to Digicell because Digicell doesn't work reliably in or near my house.