Mrs. now in Taipei for extended stay [got 2 bdrm apt via airbnb] and has been using it since her arrival this past Tuesday. Uber picked her up at airport, she's called them to drop off and pick up at Costco, and to/from visits to friends.
She says its comparable pricing to regular taxi service and excellent on time service. Plus driver helped with her bags at Costco. Airport pick up was a Benz, other vehicles primarily Camry....so far ^!