I like the 510. Mind you, I haven't had to take it in Rush hour since I was a student living in Kensington Market and going to York University. Since then I've had occasion to take the streetcar and it always seems to be very fairly punctual, though I have seen the 2 or 3 cars in a row which seem to plague all TTC streetcar routes. Plus its the only place in the city to try the fancy new Bombardier Cars!