1) Not nearly enough people will use this for this to be an issue. 2) You can choose the car you get on at all times but the very very peak times. 3) Only for

1) Not nearly enough people will use this for this to be an issue. 2) You can choose the car you get on at all times but the very very peak times. 3) Only for routes I take often - need to be at 5th car of B train transfer to F/V to get off on 23rd. Need to be on 2nd car of B train to transfer to R to get off at Rector. I'm obsessive about optimizing things, so $2 certainly seems worth it for all my other trips. As far as the site, I think the YouTube video should be more prominent, and should have more screentime for the app.