I have been in Feeders close to 3 years now. I have worked for the company for 20 years. I can honestly say I would quit before I would even consider going back to Package. Like I say to my friends I have that are still in Package....I do not work for the same company they work for. Where as before I had almost no pride in working for UPS, where my work life was one of depression, I am now an UPSer reborn. I collect the collectables, wear the t-shirts, encourage people to use UPS. In Feeders you are thanked for the job you do and given the time to do the job safely. I was shocked at the difference.
I do have to ditto those who have discussed the dangerous aspects of the job. Even though you do get comfortable behind the wheel one always has to respect the sheer size and weight of what you control. I liken the job as driving but with a house always following around behind you. Shifting gears smoothly, turning, and backing are probably the greatest challenges you will have at first. But if you apply the training UPS gives you, you will master each of those skills safely.
Besides the inherent driving dangers, again to ditto what others have said, working nights is something you most likely will have to do and it is damn hard to get used to. You just will not get the sleep that you once did, unless you are one of the lucky ones. I personally don't think I will ever get completely used to it but ironically I always bid nights week to week (I am presently on the spare list) because I don't want to deal with customer pick ups. So while you may not get completely used to working nights, you can live with it.
As for overtime, UPS had drastically cut back on it in my district. Of course the top seniority people can for the most part get all they want, but only if they bid on the right jobs. For us junior people, I hear constant complaints about not enough OT. I myself am averaging about three hours a week. More would be nice but being home is great too.
In Package I didn't want any overtime and I took every over they could give me. I would take unpaid lay-off weeks when offered. Now, if I was asked to go home, I wouldn't. I even worked one of my vacation weeks this year!
I encourage all who want a happier future with UPS to try Feeders. Waiting until your old and grey for a Porter or Clerk job is not your only option!