I have used since before it was called HR Block. Reasonable easy to use and accurate. My only complaint is that it takes quite a while to reach a human when I need help.
I have been using H&R Block software for several years now. I switched from another tax software and the H&R Block software covers all aspects of taxes in an easy-to-follow guided process. Even for a single filer like me, I received more than I did with the other software. It has a good help system for questions along the way as well as community for questions and feedback from others. I definitely recommend it if you need some guided help (and even if you don't).
Pros: Easy to prepare, Maximizes refund, Easy to import documents
Everything is good about the H&R Block software except one thing. When entering 1099 info, it won't let me enter the payee state without overriding. Otherwise, good.
I have used HRBlock for several years, now using Deluxe though I used the premium in the past when spouse was self employed. Results seem to be good. No contact from IRS, generally. Embedded Help is useful, but not always specific to my situation. The included call support helps bridge that gap. Primary irritation is the updates that trickle in deep into the tax preparation cycle. It is not obvious if the (pending) update will impact my return. In some cases, I have the "interview not complete, update pending" message in areas which could impact my return. If I owe money, I am OK waiting closer to 15 April, so this is a minor problem. If I will receive a refund, I have to decide whether to proceed at risk, or await the updated interview software. There is typically no ECD provided by HRBlock for the update, though April 15 is a drop dead date, I suppose.
I love that it pulls info from last year so that I don't have to re-enter all of the basics. Mostly easy to follow directions and/or explanations. I did run into a couple of questions that took time to research at IRS website. Always questionable as to when and how to exit; no clear instructions for this.