Got my Advantage this morning, trying to get used to it. Posted some pics on another thread. Got it with blank keys, because I use Colemak. Right now, it's a pretty tough slog. I make about one typo per word, and fixing it is usually a matter of trial and error (hunting around adjacent keys until I hit the right one). So basically, typing this is taking forever.
That said, the keyboard feels good. It's well-built yet lightweight, which is a plus for me since I work with it on my lap. I'm pretty happy I went with MX Brown in the end. The keys offer crunchy, satisfying tactile feedback.
It's a good thing my touch typing habits were reasonable to begin with, because the Advantage seems to be very particular about which keys you're supposed to hit with which fingers. For example, I keep trying to hit C with my left ring finger and hitting X instead (ZXCV are the same positions in Colemak as in QWERTY). The "right" finger for C seems to be the middle finger.
I'm glad the keyboard arrived on a Friday because I have the weekend to get some practice. It's actually pretty tiring - reminds me of my slow Colemak studies. I hope I won't take too long to get up to speed. Actually, my speed improved a little bit since I started writing this message 20 minutes ago. (Yes, this took around 20 minutes to type, maybe a bit longer. Remember, I can't hunt-and-peck because there's nothing to see on the keyboard.)
In terms of remappings, I'm trying to keep things simple and not make too many changes this early in the game. For now, I only swapped Tab and Delete, because Alt-Tab was close to impossible.
Okay, I guess I'll submit this now and go look for something else to painstakingly type. Have a nice weekend, geeks.