When I left my company, after 27 years, I chose to take my pension in a lump sum. I had plenty of money in other investments, so I wasn't too worried about it.
I used the money to fund one of my companies, and tossed the rest into an index fund.
I made back the money I used to fund the company in a couple of years; just from the portion in the index fund (it's been crazy).
Earlier this year, my ex-employees told me that the company is shutting down their pension plan. I don't think that they are siphoning off the money, Jimmy Hoffa-style, but I think that I'm glad I took the cashout.