I haven't used a 4-color board before, but I started watching online streams of bloggers' poker games and everyone uses it there. I decided to try it and at first it was unusual, but after about a week I got used to it and now I like to use it.
I just turned on four coloured deck for the first time tonight. I think I liked it. It was easier to quickly spot flushes. My worry is that if I get too used to it I won’t be as sharp during live play.