I randomly tried TurboTax (owned by Intuit) this year. My friends used it. I trusted their taste, but only that it was the best of mediocre options. I was wrong. The app was amazing. One of the best apps of any kind I've ever used. The UX from the visual progress workflow to the copywriting de-stressing you out about taxes (but not getting forced-humorous), saving sessions that you time out (you're gonna time out something as long as your taxes, trust + believe)... Just everything. I know it sounds crazy, but doing my taxes was actually fun.
Anyway... I bring this up because they also own Mint, which lots of people think is pretty nice, too (but its heritage predates Intuit's purchase of it).
All I know is... I have faith in Intuit to make something truly nice. I am really rooting for Square, because I always root for disruptive upstarts, but i hope they both make slightly different variations of stuff that will help customers.