I rode it for the first time today. Fast, clean, but very expensive and poorly signposted at Pearson.
There are plenty of airports offering the ride for a fraction of the price. E.g. ZRH (CHF 6.60 oneway non stop; ~CAD 9.00), AMS (EUR 4.10 oneway mostly nonstop; ~CAD 6.00), SYD (AUD 17 oneway 3-5 stops, ~CAD 16.50), VIE (EUR 3.60 about 5 stops, ~CAD 5.20), etc.