@Lex ****
The STV is being phased out as of Sept AND
if you enter the country after July 3rd, you can't get ANY extension on an STV, just the 90 day entry stamp :/
It also can't be used to switch to another type of visa inside the country.
All in all it's a TERRIBLE visa choice. Unless you're gonna come here, spend 9 months and then go back to where they come from, then it's okay.