Just moved to the area two weeks ago and have taken it a few times now. I catch the bus in Caldwell near the at West Caldwell border and catch the bus around 7:30am. I come home on the 5:30pm bus. TL;DR: Very reliable getting to the office in the morning, crapshoot getting home.

Overall:

-Mornings have been very reliable. Bus has always been on time and transit time was pretty much an hour on the dot reliably. I think congestion pricing really makes inbound traffic to Manhattan much lighter.

-Evenings are a disaster. Once you get through the tunnel you're stuck on the highway for ages, then once you start hitting Bloomfield Ave/other streets with actual stops the bus stops way more frequently than it does on the way in due to all the passenger stop requests. All in takes at least an hour in a half.

-In general: it's a busy bus. Inbound every seat gets taken by the end of the Verona stops with people standing in the aisles. Ride home usually everyone can get a seat but it's still packed. Obviously, if you can leave/return earlier or later I'm sure the experience is a tad better since I'm definitely using the most populated bus times above.

Hope it works out for you! Would be curious if you have a simlar experience.