Great for what it is
Of course this only covers the lines with electronic train arrival (numbered & L) because where else would it get the data? Duh.
Its useful for when youre heading to the train above ground and would like to know if you have time to get a coffee (in the morning) or stay for another beer (late night) without going into the station and looking at the electronic signs.
Not as pretty as MNR app but is actually more functional in that its a hell of a lot faster to see if a train is coming.
Five stars if it wasnt currently broken with runtime errors on the server its accessing :-(
Thee Madam Bomb about
MTA Subway Time