Redeemed this in J with M+C for me and my partner for travelling late August:

Outbound: MUC - IAD (stopover) / DCA - YYZ - YYC
Return: YEG - YVR (stopover) - LHR

Taxes + cash element:
Outbound: 18750 miles + £289.20
Return: 18750 miles + £268.90

YQ is really killing.

For our return flight, YVR - LHR, AC only released 1 J on each of the 2 direct flights, so we booked on different flights for now - it's just 2.5 hrs apart, and if AC opens up more seats in J then we will just pay £20 to move one of our flights.

The outbound taxes took quite a while to calculate, very helpful agent explained it was due to switching airports at Washington, so the taxes had to be calculated manually, but she called me back 2 hrs later with the taxes to take payment. ^