Night freight.
Out of it now, off to do something else. It's a pretty good learning experience especially if you do a winter or two. Most of the flying is at night so that is very useful for the ATPL lic requirement. The Shed itself is a doddle to fly. No real vices but getting long in the tooth now so some entertaining systems failures will occur. This does make you think and give you stuff to talk about in interviews.
It's all 2 crew so that's useful. You'll fly at the flight levels where all the ****ty crappy wx occurs and only fly to Cat 1 standards. Gets you thinking about alternates and minimas etc. Most of it is hand flying, autopilots take up valuable freight weight. Some don't have GPSs so you're back to good old VOR/NDB/good guess navigation.
You'll find out pretty quickly that you're just a tool for management to earn money with. Cost them any thing and they won't like it.
it is worth it for the experience. Just don't stay there too long.