I think Signs is a wonderful concept and am so happy to see that a place like this exists in Toronto. Our server was wonderful (I wish I could remember her name!) and everyone seemed generally happy to be working there. It's a positive, progressive environment but I do think there is some room for improvement.
I didn't like the hostess (who could hear). She told us we weren't allowed to be seated early when we arrived before our reserved time and my friend and I didn't realize at first she was joking. I've worked in customer service and think it's unprofessional to be sarcastic with people you're greeting and have no prior relationship with.
I also felt that the prices were a bit high for the quality of the food (my pasta, for instance, was cold). It seems more like the type of place you go for the novelty experience and to support to ASL community rather than enjoy an exceptional meal. Signs, however, has such a commendable mission that I felt really terrible requesting they heat up my dish and even deliberated writing this review but if the food improved this restaurant would truly be out of this world.
Also, I believe they have the best customer service of any restaurant I've recently been to in Toronto (excluding the hostess). Our server even wrote an apology about the food being cold on my bill.
I wish Signs the best of luck in the future.