One key thing that you will want to keep in mind, especially if you are just buying the calls or puts, is that TASR's options have an extremely high implied volatility(around 112) and if it returns to its norms(around 80) you can still have a loosing position on it even if the stock moves in your direction. So be warned. As far as assignment goes, if you are simply speculating and do not intend on holding the option to expiration you will not have to worry about being assigned. Good luck with the trade.