I did just the switch covers, to me, the contrast between the black housings and chrome switch covers looks good. As others have said, you do have to be careful with the switches and take care to not lose the springs on the horn and starter switch. Take your time and you'll do fine.
I did the H-D Chrome Switch Housings and left the switches black. I like the contrast of the chrome and the black. I went with the chrome master cylinder cover and the Kuryakyn ISO-Grips with Gold trim rings. All of the contrast of black and chrome is awesome. I think too much chrome is just as bad as not enough. It takes a while to wash the bike and the more chrome I add...the more I have to shine.