This is basically a transport service to Woodbury common outlet. Keep in mind that you do need to go to their ticket booth to replace the voucher with the actual tickets. I didn't check if it is actually cheaper by booking online or not.
I booked for 9.30 departure and as suggested on the voucher, I did arrive 30 minutes before the scheduled time. The bus departed at about 9.10.
The journey was about 1 hour and 20 minutes.
The bus is quite decent and clean. There are few rows on the left side with extra leg room which is nice if you could get it.
Return service is very frequent, I did miss the first bus but there was 2 more bus already waiting behind it. The return time was significantly longer due to NY traffic.
On the overall, the tour was well organized and Woodbury Outlets is the perfect place to see all the brand stores at one place. You got the feeling that you are in a small European town composed entirely of shops.
Maybe the bus service should be improved a little bit. The lines are too long and even if you purchase a ticket for a specific hour, you still have to wait on line. So, be there early, early, early!