I'm sorry to be what seems to be the lone one star review.  Either I got there on the worst day in their history, or everyone drank the Koolaid, or I just have different expectations and taste buds.
It seems like a great idea.  It's a build your own burger joint, $7.00 gets you a cooked to order burger with one cheese, up to 4 toppings, and 2 sauces with fries or onion rings-or some other choices.  They also claim that the beef is local, hormone free, etcetera....

I chose a rare burger with American, grilled onions, sauteed mushrooms. tomato and lettuce, with mayo and mustard on a potato bun.  I added bacon for a dollar.

First, let me point out that if you are in a hurry, DON'T GO HERE TO EAT.  I waited exactly 39 minutes for my food. This would not be a big deal if:
1.  I had been warned before they ran my credit card--what if I only had 30 minutes for lunch??
2. They had places to sit but it's tiny and full.
3.  They had magazines, a jukebox, ANYTHING to entertain you for 39 minutes.  You can't even get your drink early to sip on that.

At the 30 minute mark, I'm ready to eat cardboard with a little ketchup on it, so maybe they make you wait so everything tastes even better?
Anyway, before my burger comes up, I notice that the lady behind the counter is saying that the orders overwhelmed the kitchen.  I look in the kitchen---they have ONE GUY TRYING TO DO ALL THIS??????   He'd better be getting a share of the profits!!!!!  Now I'm jsut feeling really bad for this guy back there.

I finally get my burger!  YAY!!  I'm SO excited!  All those 4 and 5 star reviews!  I take a bite and....the patty shoots out the other side of the bun like it had been shot out of a cannon.
WTH?  I look at the patty.  It's clean as a whistle. I mean there is no mayo or mustard or cheese smeared on the patty.  I turn it over and it slides out of my fingers back into the basket.  The other side is clean too.  The freakin' burger was so greasy, it slid all over the place!  Then a greasy glop of what must have  been the mushrooms and onions slid out.  Still not seeing any cheese, mayo, or mustard anywhere.  Just oil.  Tons and tons of oil.  I open the bun,  On one side is a heavily oiled slick of lettuce glued to the bun by (I am guessing) a slice of cheese.  The other side of the bun has some mayo and mustard residue--and more oil.  I'm grossed out, but hungry.  I take a bite.  It's not rare,  It's well done and oddly, tastes very faintly of liver.  BTW, remember the bacon I paid a dollar for?  Not there.  I'm really puzzled that instead of cheese. or beef, or SOMETHING, I just taste that faint livery taste. So I take another bite.There isn't even any salt or pepper, or anything on the burger patty.  This is perhaps, the worst grade of meat available for human consumption.  I take a third bite because that second bite brought back a memory of when I worked for a meat company here in town.  Now I recognize the flavor.  I'm not saying that what I ate that day at Two Hippies was old dairy cow, but that's EXACTLY what it tasted like.

At this point, I turn to the fries.  The are shriveled and DARK and taste like they've been fried and then microwaved.

I couldn't get out of there fast enough!  Forget my danged dollar!  just get me in the car!

Exactly one hour and 20 minutes later, I had vicious diarrhea

I haven't had that trouble even with eating junk food at the fair!

No.  NO.  A thousand times NO!

Red Robin is my next burger stop.  Period