You don't hear about the successful LBOs...because they're extremely rare. The only LBOs that worked out for the acquired companies are for those like Hilton, which occurred right before interest rates dropped, allowing the acquired companies to refinance their debts at lower rates than incurred by the LBO. The recession that occurred right after that LBO also let them fire tens of thousands of workers and shutter hundreds of locations and blame the recession rather than the shitty PE management and pillaging.
Toys R' Us and Neiman Marcus are the prototypical LBOs. Whether or not the LBO succeeds, PE gets rich, everyone else gets screwed.
I can only speculate on what the investor's true motivations is. But there was one episode in particular which was interesting:
1) The investor came in, offered up a few hundred thousand dollars for a 51% stake
2) He immediately had the company upgrade their equipment, purchasing new equipment
3) Eighteen months later, the company was bankrupt
When all the dust settled, the company was re-packaged and sold to another company, the original owners were gone, and the manufacturing was sent overseas.
When the investor was having them buy a bunch of equipment, I was definitely wonder if his prime motivation was to simply have some tangible assets that he could recover once the inevitable bankruptcy occurred.