$1350 is alot of money for any trading class. Took a look at the schedule for the series 300. Seems like all you are getting is an introduction to order routing, level 2, and ECNs. With a brief intro to technical analysis and a couple of hours on risk management. You can probably find all this info on this website for free.
Nothing beats real experience. You are probably better off spending some of that money on quality books(look at the reviews on this site) and saving the rest towards your trading account(and being prepared to lose it all).
The biggest danger of courses like these is that you might take it and become overconfident. Everything looks easy in a classroom environment. Maybe if this class cost $100 it might be a good intro for newbies, but not $1350.