I've been using them for more than a decade on their other domain https://www.taxhawk.com. I think their software is great and there's no dark patterns, you can even submit your federal taxes for free without paying to do your state taxes. I also really like that I can review my filled out 1040 before e-filing.

The price for state taxes is $15 where TurboTax would cost me over $100 (I have business income).