Originally Posted by
blitzen
Normally I wouldn't but the outwards leg has the risk of getting delayed by summer weather events (we have sometimes nasty winds there at the east coast ... not as high as in Chicago etc when a storm hits but enough for delays. And the next flight to hannover is many hours later .... coming back is less of a problem as getting back to the NYC area is easy.
Not worries just being prepared ("when you are prepared it will never happen "Murphy)
Apart from knowing where you are going when reaching T5 what else do you want to do? The premium car transfer is not automatic and not on request.