Everyone knows that you don't go to Panera Bread for the food. I came here for the restroom, and that's what my stars count toward.
There is one urinal and one toilet stall wide enough for those who are handicapped. Safety first, and even Panera does a good job of making sure their customers are aware of any wet floors with their stand-up caution cones. The stall door swings in and the lock works fine. My only beef is with the toilet seat covers. They ripped too easily when I tried to peel one out. As a result, I sat down bare-cheeked.
My only other complaint is that the Wifi connection took too long on my phone. I can only imagine if I were a hungry customer who was too shy to order at the register, and wished to order from my table using Panera's slower-than-casual pace Wifi.
Props to Panera for having an eco-friendly dual-flush handle.
Only 4 stars because I've been to finer bathrooms in Tijuana.