Haven't used any other tax software in years, so can't compare. But it has always done the job for me. The only thing I would like to see added is an IRMAA surcharge warning. I believe the IRMAA brackets for the tax year are available, even if the actual surcharge won't be assessed for 2 years.
Usually I would give H &R a 5 star rating. Never had a problem in previous years but this year my returns were submitted and 3 days now I'm waiting for them to be accepted. May not be their issue but, also, no advice on how to proceed.