Thinking About SEP IRA Plans

So the new job offers employees
SEP IRA Plans for retirement. I have no idea how they work. They look a bit more flexible than 401ks at first glance, but I don’t know for sure.
I’ve been poking around the net checking out info on Sep Retirement, but it’s complicated. It’s just not he sort of thing I like to spend my time thinking about. But of course it has to be done.
It will be good to get some tax savings out of the deal at least. There are few enough ways to get ahead of the ever-growing tax monster these days.
What do you think?