I used FreeBSD exclusively for a some months on my primary laptop, a Lenovo Ideapad. I never did get wifi working properly (I believe support for my chip is in 10.3 or 11.0) so I had to buy a ten dollar dongle. FreeBSD does not support integrated graphics. I think I got around this by disabling one of the graphics cards. But I'm not certain. I also couldn't get power management or sleep mode working. So I got used to shutting down every time I put it away.

My work now has me using OS X, but I keep the FreeBSD machine on a vpn because I love working on it. If you're thinking about, I'd highly recommend looking into the FreeBSD and OpenBSD support for your laptop. Otherwise just buy an x220.