We've been to Comet quite a few times and while the food is always good, we almost always have to wait quite a while for a table. The service can be really good or very poor, as well. In our opinion, it's not worth the wait when there are so many other places in Milwaukee that have great vegan food.
As far as the food goes, we do love everything we've ever had there. The vegan gyro and vegan burgers are our favorites. They always have some vegan cupcakes and pies from Honeypie and have the best side salad we've ever had. Go for the food but be prepared to wait for a long time and possibly get poor service and/or a table that's near where everyone is waiting for a table (which means you'll have people pretty much standing right over you the entire time you're dining).Pros: Excellent Food
Cons: Service Isn't Consistent, Often a long wait for a table, Parking can be hard to find.