I was a steam-only guy until I went into the S-76C+. During initial, for the first five or so hours in the sim, you could have taken the glass and thrown it out the window! I was using the backup analog, because they were the only things that made sense to me. After I got used to it, glass became second nature, and now I wouldn't trade it for anything. I've got some time back in steam, and it is actually harder for me to interpret than the glass (and I had 7,000 plus of steam first). Even doing low level, the glass helps out by giving trends in altitude and airspeed. Very easy to pick up the cues once you get used to it.
I've also got some fixed wing time with glass, and there it is truly a no brainer. Glass gives you so much more situational awarness it ain't funny!