I've been here way too many times in the past year, especially since people at my work place tend to love going to DonDon for lunch. Call for lunch and dinner cuz it seems like they are pretty busy at both times.
The lunch special is usually pretty value, you choose a set/combo and most of them come with miso and side dishes. For dinner, the price does add up to quite a bit if you're a big eater like me. Most portions are very small, so it's a good idea to go with couple people and share everything. Recommend the kimchi udon!
There are couple other great izakayas in Toronto with signature dishes.