It looks healthy so far. 5 point leaves coming soon, then a transplant, and off to the races.
Why would you flower it on the window sill, other than to show it can be done of course? I recognize the added skill level needed to do so, but are you setting out to show your skills, or trying to grow the sexiest Steem OG plant possible?
My Steem seeds are still dry, but I'm contemplating popping them soon, since my 4 pink kush ladies are just starting to flower. "Legalization" is happening in 10 weeks or so... everything is changing and they're looking to put a LOT of good people in jail for plants, so I'm being cautious.