It does pretty much take me to my door. Last year I had to go to Vancouver for meetings. I threw my carry-on over my shoulder, took Bikeshare from Cabbagetown to Union and a quick train to Pearson. Loved it.
But what was premium is in its comparison to the subway. The UPE was quiet, comfy, perhaps even dignified transport. The little table is great for your coffee and tablet, and free Wifi was nice. There's no one standing over you holding onto a rail, no crazies or smelly folks, no one clipping their nails, no one hitting you with their backpack, no smell of urine or beggars walking the car demanding your money. That sounds like premium service to me.