Do they make you pay the toll fee + ETR's own fee (for not using a transponder) AND an extra "processing fee" from the rental company? IMHO, unless you have a transponder or can justify needing to use the 407 stay off it. Thank god I have a transponder.
BTW: If someone rents a car in TO can they use my transponder or do they cross check licence plate numbers to the transponder code?