3 stars hits it on the head.
Service is good at the bar, but can be slow on the patio. They seem to take quite a while to notice you at first especially if its busy.
Food is exactly what Yelp says for 3 stars... "A-OK" but nothing to go out of your way for. It's pretty standard & unimaginative fare; they don't seem to have any items that really jump out at you. I've done burgers, various apps & one of the cake-in-a-jar desserts. The bruschetta is HUGE, in a giant martini glass, and probably the only thing I would really be excited to order.
The prices though, are absurd. Seriously. Once I remember that, is when I start to ask the suggesting friend "Ehhhh can we go somewhere else?"
All the apps run $10+. The drinks are even worse. Nothing good or 'specialty' is on HH pricing. Mules, martinis, other cocktails are in the $10 range; it's insane. The liquor pours are definitely on the skimpy side. Could barely taste anything in my drink yesterday, and the Fireball shots were about 3/4 of an oz. instead of a full 1 oz.
If they get another fun bar in Tempe Marketplace (that isn't primarily geared towards being a restaurant like everything else), Louie will be knocked off the list, but until then it's acceptable.