I have been using it since it went national. You get no local channels. All shows on ABC, FOX, and NBC are available on demand through Vue. CBS has its own app that is $5.99 a month. The only channel I really miss is the History Channel, but I am saving $65.00/month with Vue.
The DVR is just like any other DVR, you pick your shows and it records them. Shows are saved for 28 days. You are allowed 5 profiles, so everyone can save their own shows under their profile, which is nice.
I stream through my PS4 in my living room, use fire TV in the master and a fire stick in the guest.
I do have suddenlink internet and have not had any issues with buffering or poor video quality. At this point I can't envision going back to cable.
FYI.. I have the mid tier $35/month plan.