Quote from deltahedge:
Unless you're buying DOTM on SPY/SPX or other LIQUID equity option, you may want to stick with some of the more tried and true brokerage firms only because you'll get decent fills with IB and/or TOS.
If you cannot get filled or get filled at a shitty price, I can guarantee you the cost of commission will PALE in comparison to the cost of a poor purchase (or sale) price. While brokerage firms get paid for order flow, I have heard that eOption is notorious for poor fills given their routing system that redirects orders based on payment for order flow. At least with IB or TOS you can pretty much trade on any given option exchange and the order will be routed to the exchange where the liquidity is greatest.