All laptops at home are running ubuntu, and so is my desktop. For me it was seemingly the opposite to the experience of many people here. I had no issues whatsoever with the laptops, everything worked pretty much out of the box. No issues with function keys not working, wireless, audio or anything else.

On the other hand, on my desktop I had a lot of issues with random system freezes, and with the audio. My headset would have a constant crackling and the graphics card had quite a few issues.

As with most things, YMMV.