I've an elderly Asus notebook nowadays as my PC, with 10.2 on it that I installed rather recently. It's battery is long-dead (I use it as a workstation mostly), so I can't comment on that, but suspend/hibernate does not work for me. FreeBSD does not have hibernate, and suspend, AFAIK, does not work with Xorg, so it's practically useless. There are some posts that demo how to do it, by unloading troublesome stuff before suspend and reloading them later, but I didn't get around to trying that yet, because suspend does not resume, and hard reboots give me the shakes without a backup, I couldn't port my backup script to't yet.
Performance-wise, I did not notice much between Arch linux, what I was using before, and this. My setup is very light, Emacs+Xombrero on TWM. I notice, though, a certain performance problem with video in browser, but that may well be Gstreamer plugins that run slower than Linux on *BSD, I can't comment, as I don't know the internals. But VLC works just fine.
Running it on a laptop is a bit of a science project still, if you want a seamless experience it's not really there, but it can be done. At this point you can use up to Haswell intel graphics with suspend/resume.
I run it as a desktop OS on a Lenovo G700 and those all work fine.
Hardware support isn't as complete as Linux but it isn't bad at all either. Chances are anything that's older than 2-3 years will work out of the box, anything newer may or may not require a little tinkering.
Performance-wise, I did not notice much between Arch linux, what I was using before, and this. My setup is very light, Emacs+Xombrero on TWM. I notice, though, a certain performance problem with video in browser, but that may well be Gstreamer plugins that run slower than Linux on *BSD, I can't comment, as I don't know the internals. But VLC works just fine.