Pros
It is a very dynamic environment with lots to learn and practice that knowledge. You will be doing a job asap after training, especially if management really needs you, and positions are always available out there. Young stuff, maybe fun place. Strick regulations to follow and avoid mistakes, ANY! Might get fired on the spot if done something wrong. I put almost 3 years there and for me it was OK experience with lots to learn and overcoming myself. Treat this job very serious as it involves saving people lives and collecting good plasma from healthy people is vital. No shortcuts. Benefits are ok so is the team spirit! Be prepared to depend on each other since cross training is inevitable.
Cons
Favoritism, low pay for amount of work you do, and management who either like you or not. If not, you are in trouble! Donors maybe rude and under influence and you gotta be able to stand up for yourself as an employee. Sometimes low moral at work place. Have to work a long time and very hard to get a decent promotion. Long hours with over pay if full-time, but lots of stress since amount of donors and employees may not be balanced well.