I tried one of these with a group.
What I did was give the sheets of the characters pre career to the players (with basic stats and background education skills). Players wake up from cold berth in a room: They discover they are prisoners of a group of mercenaries/pirates, through a screen their employer sends them a message telling them she managed to sabotage the mercenaries systems but had to retreat without picking them up, then she gives them an rendez-vous on another system.
Then as events unfolded, I made players roll for terms of their career as they gain their memory (choosing them their first career): first their older memories, at the end the memory of the latest events.
It was a disaster.
I did it so players could start playing quickly and still create their own characters, thought my system had potential. However they seemed unsatisfied with their characters stats and careers, frequently changed careers because of failed survival rolls or just wanting to change careers, etc.
We did not go far because character generation took up pieces of time, and also I spent extra time and effort to keep a character alive who's player seemed to have decided he wanted his character dead.