Super Duper Burgers is open in Mill Valley
But someone else will have to report of the food there, someone who is less averse to large crowds of people crammed into a small space. For location reference, it's a very short distance south of Whole Foods on Miller.
Super Duper Burgers
430 Miller Ave, Mill Valley, CA 94941
Made my second visit to Super Duper Burger in Mill Valley today and it was better than the first, which was very good. This time I ordered extra grilled onions on the not so "mini" burger and the garlic fries extra crispy and they were delish, sprinkled with garlic, fresh parsley and a bit of grated cheddar. I also ordered the "special" sauce (which is bland but works as a dip for the garlic fries) on the side and added a bit to the tasty and satisfying (4 0z) medium rare cheddar burger myself. The self serve cucumber pickles are still steller, crisp with a faintly middle eastern flavor. And the Racer IPA was the perfect quaff. This is the best $12 I've spent in an American type diner in a very long time.
At 4:30 pm on a Friday afternoon it wasn't crowded at all and the staff is super friendly and helpful. Forty five minutes later it started to fill in. The MV location is bright and airy with outdoor seating. Inside there's drift wood looking table tops, metal chairs and booths along the wall. Parking was pretty easy, tho' I imagine their lot fills up fast when its busy.
I've been an IN n Out fan for a long time, still am, but if you want to upgrade w/o spending $20+ on a very good burger, fries and a beer,(they also have a white and a red wine avail.) try Super Duper Burger.