All their a/c are pretty nice EC130's and AS350's. My 2 cents worth is that the pilots fly long hours (both flight and duty), so maybe consider not taking a flight right at the end of the day/night - everyone is pretty tired. If interested in a sunset tour, check local sunset times. Liberty tends to close around 9pm local, but it varies a little on the time of year.
Might recommend one of their medium-longer tours for best value. The short tour just runs from W30th down the hudson to the Statue and back, pretty quick.
As a helicopter lover, why not also walk the 100yds to the other part of W30th St heliport and get your hair washed up against the fence watching the S76's, 430's and other aircraft as they land 30 ft in front of you spraying seawater at you
Have a good time.
NY pilot