I went exempt about 4 years ago. I got a 10% increase with it, we get paid straight time after 40 hours, but have to put in a minimum of 6 hours first. We do get paid for the first 6 though, it used to be that we gave them 5 hours free then started with hour-one of OT.
I figured out the break-even point between my old and new salary and where I start to lose money by putting in OT.
We had one guy some years back, he got his degree but nobody wanted to promote him or have him working for them. He made a big stink with HR since the company did pay his tuition. Well, they did promote him. He went from working 75 hours a week (40 + 35 hours at the X 1.5 rate) to the bare-bones 40 like the flip of a switch. Which did not sit well with management and he was one of those who HAD to quit the company. Persona non grata all around.
I think overall the move to exempt is a good one especially with any perks that go with it. Paid cell phone, company credit card, use of company car, etc. With where I now work, if you have a degree that goes with what you do, you practically have a bulls eye on your back and you will eventually be made exempt.
We have one guy in the group with no degree at all. They created a title for him so he gets a higher rate and still gets the 1.5 OT diferential. But I know he makes around $20k less than I do as a base salary. With OT he has to work 400 + hours to be where I am for working no OT.
Rob