Limited utility
Sometimes it calms one’s soul to know if your train will come soon or not, but that’s all this does. It doesn’t work between stations (no Internet). It shows only the next five or six trains, so you can’t see connections that are, say, 20 minutes out. To see connections that are not at the same platform (that is, ones you have to walk to, as E to 6, or R to 5, or L to F), you have to memorize one train, then start over, back and forth. End result, you might save 5 minutes off your trip by using this, but you’ll be using it the whole time, rather than doing something you’d rather enjoy. And if your train pulls in just as your connection is about to leave, you can still watch them close their doors and leave before the doors on your train open. Better not plan your connection down to the minute. By now, all these limitations should have been addressed. Apparently MTA’s standard of excellence is just “good enough” and they leave it at that.