Sure. The shortish version is that I took an investment from someone who I have known for years and is quite a capable investor but even before I took it I was questioning whether or not I should. At the time I took the investment I was in need of funding to continue growing but also I had grown my head count too fast so I actually needed the funding or had to lay a few people off. He saw that as an opportunity to get more for his money, which he did because I was in a weak position (in hind sight I saw this as a warning sign because he was short sighted on the business).

In the end this particular investor questioned every decision we made, wanted to be involved with client meetings, tried to use us as his personal IT/development group without payment, tried to drive us into his personal projects, would show up at the office and start asking people what they were working on and if he disagreed he'd tell them. So overall he became a royal pain in the ass. In the end we wound up getting him out of the business through raising enough money on good terms to buy him out, but it is an experience I would never want to repeat.

What I took away was that if I have any bad feelings, odd feelings or feel something just isn't quite right, I pass now. Divorcing a spouse is hard, getting rid of an investor can be even harder. This is because you basically want to placate this person until you can get them out of your business so they do not go off and become a negative effect on fundraising for you or for the business as a whole. An ex spouse, even if they are screaming you are a douche will be viewed as just a bitter ex, an investor doing this will turn off other investors many times for valid reasons.

If you have specific questions happy to share my experience. I know we had a nightmare with this one, but have had amazing help from others. Just with this one person I could go on for a long time with the nightmares, but hopefully the "short" version covers the key issues.