Would have liked a different outcome, but besides that, good. It is a nice stadium, with a pretty good setup for food/restrooms. We had nosebleed seats, and enjoyed the fact that we ended up being right below Sam and Joe!
Since it was a weeknight game, there were fewer Rangers fans than at other games I've been to. But there were still some pockets of us sprinkled throughout the stadium. My buddy and I happened to end up in a small group of NYR fans just by a happy coincidence. I'd imagine Saturday you'll get quite a few more though since its a weekend game - every weekend game I've been to you see way more blueshirts.
Caps fans are typically one of the classier fan bases out there and don't generally jeer or chirp away team fans. The worst you'll get from most of them are friendly digs at you, which are all in good fun. But of course, with any fanbase, you'll have the complete dbags who are either way too drunk or just enjoy going out of their way to try to start ****. If you just ignore them or brush em off, they're pretty harmless - and they are the exception. Other Caps fans often actually look down on that type of behavior and discourage it. Had several of them actually apologizing for some guy's behavior and saying stuff like "He doesn't know what hockey is all about."
If you're going Saturday, should be a good game and a good time.