If you have to ask that question you might not want to be messing with flashing tunes at all...
Suffice to say, $100 is cheap for an unmarried SCT device. You can use it to load anyone who tunes for SCT.
As far as Bama tunes... they are ok. But anyone running a tune really should have a wideband to make sure the AF is correct. Bama is notorious for tuning on the rich side.
2000 Mustang GT Steeda #0048
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.