I myself have been a commuter for many years in my previous career. The train line in Glen Head is a double decker, cozy and quiet during the commute. You usually have to change trains in Jamacia but its not a big deal as the rest of the ride is relaxing. Also, Glen Head has the option for Busses to commute to NYC. They are a cost effective option as well as a very comfortable less than 1 hour straight drive and drop off on certain streets, thus avoiding Penn Station all together.
If you have any questions feel free to call me