I'm using it and I'm not impressed with it. They had a 3 month trial for 10/month so I switched to it from Playstation Vue and it's great for that cheap price but when that ends and I'm paying $40/month i'm going back to Vue. The interface is clunky, the dvr is non existent, the on demand is lacking, and it has buffer issues on peak shows as I don't think they handle the demand well. The only thing Directv Now has going for it is the cheap introductory offer.
I'd say try it for the 3 month/$10 offer but be prepared to switch to a better service at the end of the trial.