Based on my love of Dosas, being in the area and positive reviews I decided to give this place a go a short while back. In spite of the garish decor (which you can see from a mile away), I wasn't deterred and looked forward to a finding a great dosa place while I'm in Toronto. Sadly, I'm still going to have to keep looking.
As much as I wanted to like South Indian Dosa Mahal, I found it a tad lacking. I've had dosas and plenty of them and most of the time I'm pretty easy to please. When I ordered a masala dosa and received something that wasn't even assembled, I was pretty upset. Why were the potatoes on the side? If the food was good I'd be okay with it, but it was bland and rather flavorless. Not to mention the fact that the afformentioned decor is retina detaching pink, the prices are average at best and the service is nothing to write home about. So sorry, no special consideration there!
If you're in the area and are really craving South Indian food, I suppose it's really not that bad. But by no means is it worth making the trip for.