I flew YYZ-HKG last week and upgraded myself for $899 from Tango Plus 24 hours prior to departure. Thought about it, and decided to treat myself, considering it was a 15 hr flight.
3 people in the aft J cabin, including myself. Considering it was $3400+ one way in Executive Lowest, I'm pretty happy!
Not sure if it was a great deal overall as it was my first ever LMU purchase, but way better than the LMU offered when I flew SFO-YYZ... that upgrade option was approximately $1300.
