I've used freetaxusa for almost 20 years now. I'm always surprised more people don't know about it (granted, from the name, it does sound like a total scam).
Wish we didn't have to file taxes at all though...we have the technology.
One year I tried a couple of those free services, and they told me I owed over $5k. Not even exactly the same number. But turbo tax told me I only needed to pay $2k. Guess which one I used?
Not saying it's always that way, but made me a lot more cautious about the smaller tax filing sites. It's worth doing your taxes twice or more before submitting them to see the difference.