I've been using FreeTaxUSA for 4 years now and love how easy and streamlined they've made the process. Prompt screens are clear and concise. If I'm not understanding something they have info bubbles on each item to give a little more background information.
Unfortunately, FreeTaxUSA is being given negative reviews based on the time it's taking people to get their refunds, which has nothing to do with them! So please people, pay attention to the reason why your return has not come yet. This service is just the mailman delivering your package to the IRS. Well, your package was delivered, so why are you getting mad at the mailman after he did his job? Simplified analogy, but you get my point.