Streetcar build quality is pretty sub par and if you look at all of their projects, the exteriors are in very poor condition and look unfinished. Not "loft" unfinished but "we're cheap" unfinished. It's for a flip, so may not be as big of an issue with you, but if you do your research, you'll see a lot of issues with this builder.
That said, quick flip and condo in today's market are words that should not go together. Pre-con his now at the same price or higher than resale. Keep in mind, when you add taxes and closing costs (which can be 20-30K nowadays) I don't think there's much room to make money. Also, CRA is cracking down on these kinds of purchases. They're trying to come down hard on quick flippers. So I'd strongly suggest against that idea.
Good luck.