I've been to Banter about a half dozen times. I mostly use it for the retail bottle shop in the back, so that will be the focus of this review.
Service: staff is always pleasant, well informed about the wine and beer, and eager to help answer questions or make suggestions.
Ambience: casual, minimalistic bar area that always appears clean. A step above a dive bar. Not a sports bar (one small TV). Big glass windows at the store front allows natural light to flood in during the day. A bit dark at night.
Product: rotating selection of wines and beer that you might not find elsewhere especially if you mostly shop at the grocery. Inventory definitely has variety. Beer is not just IPA's and hoppy offerings, and they stock international brews too. A couple fridges dedicated to build your own six packs. One knock, some of the six packs can be a bit old so be sure to check the age statement especially if you are buying something that is best drunk fresh (e.g., IPA's)
Overall: recommended