Here's the deal, it's an automatic 5 stars because there is no place else that has hundreds of sodas for sale. That in and of itself is worth the trip. What you want to do is get a 6 pack (or two) to save a few bucks and have a few different bottles to take home with you and try, so you can even begin to figure out what you like or don't like. (Or go to the festival and try them all, if you can handle even 50 at a time)
As far as the Deli part, they have Boar's Head which is your top of the line meats. The sandwiches seem on the pricey side but you're getting what you pay for, this isn't Subway. The pickles are a nice touch. If I remember right they even cut the sandwich through the paper like a real deli. Think there is also ice cream and even wine and/or beer now.
2 bonus points added for the retro arcade games at the front of the store for the kiddies to play. 0.5 bonus points subtracted coz the old Homer Soda Fest merch was too high last time I was in. Need to lower that down, shot glasses with a date on them have to be cheap. The only people buying those are the super fans and you gotta keep the super fans happy.
All in all this is a 5-star top choice anytime I'm passing through the area and want a NICE meal.