Check in time limit at Shanghai Pudong airport

Hi,
I will fly out with a low cost carrier called Spring Airlines from Pudong. The flight leaves at 8.40am and their recommendation is do be done with the check-in procedure 2 hours before. Now, it seem difficult to get to the airport from there I stay in the morning. I've seen reports where people taking the same flight take the first MAGREV traing, leaving 6.45am, meaning being at the airport at around 7am.

I would never be at the airport 2 hours before in Europe(even if officially recommend). However, this is a unknown airport to me and it's also a low cost carrier.
Do any of you have any experience in similar situation? A more realistic suitable arrival time? Can I make checkin-immigration-security etc if I leave with the first MAGREV?
Thanks!