I'd suggest FreeTaxUSA.com as an alternative. Federal is always free, and state taxes are ~12/state. I don't have anything obscure about my taxes, and their forms indicate they can handle much more complicated situations than I have. I've used them for 3 years now, with no issues.
I will say their system is a bit clunky. I feel like I get in loops sometimes where I go through already filled in information and wish I could just jump to the next section. I wish they would give me more questions on each page so I can better understand how a response to one question filters through down the line.