The IRS Hub or BETA testing runs from 1/15 thru 1/18/19 this year and most all software, except Intuit, participates. I haven't heard or seen any horror stories involving other Professional software but TurdoTax is at the mercy of the individual entering the data & is subject to many rejected returns. 

Personally, I didn't submit any returns early this year for obvious reasons, "Tax Reform". Not putting any of my clients in the guinea pig option.