Akiba Kissa is indeed an interesting place. Saw some of my foodie IGer posted pictures of their desserts and I thought they were very cute, so on a weekend, I came here for a visit with a few friends.
You can either pay 15$ to sit in to enjoy the manga or games with a drink of your choice, or you can just pay for the desserts and/or drink and sit at one of the tables. We opted for just buying a dessert and a drink and chilled for a bit.
Desserts are indeed very cute and IG worthy, drinks are okay but I am not sure if it's worth a total of $15 price tag. Love the Japanese mange cafe concept with huge open space and to make it even better, they also got the Gundam Extreme Versus arcade game system which is very popular in Japan and I personally play it on PS3 as well; another bonus! If you are a big fan of building or collecting gundams or Japanese figures in general, they also sell them at the store or they can order it for you at a very competitive price!
Overall I would give this place a 4.for cute great tasting desserts (Tortoro was amazing!) and a heaven for all mange/anime lovers or otaku in general!
My only recommendation is maybe offer some curry fishballs or small Japanese snacks on their menu? I'm sure they would attract more gamers to stay there for an extended period of time instead of just ramen!