I've only used Dominator and as implied above, is where I focus a bit of attention. The price is decent but my real preference for it is a like the product line and it is super easy to use. Ease of application tends to mean it will be used. Race Service might be just as easy to use but since I'm already using Dominator and have quite a bit of it, I'm sticking with it.
I'm a bit rigid on my base prep so I don't have to worry so much about going an extra day or so without waxing or if in a jam, I can just rub something on. What I do know, is that even when I slack off, my skis are faster than I am.
Conversation with one of the senior race coaches where I coach on the lift:
Coach - "Why don't you put cold wax on? You'll go faster."
Me - "All that will means is I'll skid sooner."
Rest of the chair -