Geoff K.
Yelp
Sosta's is actually pretty nice, although I think it gets defeated mostly by its location/environment. Went here for a Valentines Day date with my SO at the time, we ended up having to be seated at the front of the restaurant, right in the window. Due to that location (and the fact Valentines is a busy day for Rundle St in particular), we had the noise from the general chatter in the restaurant compounded with the street noise. This made our time there very loud and very hard to have any kind of conversation, I would definitely reccomend making sure to sit at the rear end of the restaurant.
Other than that, the menu was interesting, if not limited. For Valentines Day they had a specialised menu/set meal that was the only thing you could order (Entree through to Dessert in one). All of the food was new and interesting and tasty, all of the flavours were very well done, there were no overwhelming flavours from memory. The drinks menu was good, too, plenty of local and international wines and beers available.
TL;DR Make sure you sit in the rear of the restaurant if you can, otherwise it is very loud. Food and service is good, 7.5/10 would recommend