At the end of last year I also had the very special opportunity of playing a couple rounds for the first time at ANGC, we did also play the 9 hole course.
I can only repeat the sentiments about the experience and it being incredibly unique. Realize the course from the members tees is about 1000 yds shorter than what's played for the Masters. I don't by any means consider myself long, probably more wide than long off the tee but all the par 5's were definitely reachable for me and there was literally no roll when we played so that says a fair bit about the distances which only made it fun, going for them and managing a few easy birdies. (relatively speaking).
It was my first visit to ANGC having never attended The Masters or walked the course. The biggest surprises for me were definitely how open everything was, how much width there is, how much elevation change there is to deal with (naturally I had also been warned about this but still) and perhaps more than anything else how small the greens were compared to what I expected.
The one part of my game that I was really really successful with on weekend I was there was my short game and chipping/pitching. I putted average (which is my favorite part of the game) I didn't make any long putts but also didn't have more than perhaps 4 or 5 really semi crazy putts after approaching into a less than ideal positions. While I didn't make any longer putts the greens were not running at lightening speeds, maybe 10.5 - 11, though they said faster but I didn't feel that. What I did decently with putting was lagging the ball near the hole to be able to tap in. I think that's where you can really get into trouble, at least if you are putting out there. You can have 2-3 footers that really are breaking a lot and a poor or unconfident putter could be out there all day trying to finish.
They put a real stress factor on trying to play in 3.5 hours which is very cool although at the same time I think on your first visit the time goes so fast you almost wish it could just take a lot more time so you can soak everything up. At least that was my feeling. I was also kind of nervous, more so than during other rounds but it was a really special occasion. I usually play better when I feel that way but notice that the time goes by so much faster. Blink and it's already over. The weekend for me went by way way too fast.
I was lucky and hit some very good shots on key holes which certainly doesn't always happen when you play a new course for the first time. I've had more than my share of days at really cool places where if it weren't for enjoying the walk so much and the company I could of better stayed in bed.
In this vain I managed a truly ridiculous bogey (that could of been a disaster) when my chip out of the trees on 11 switched sports to pinball. Then I threw up a Hail Mary slicing a 5 iron off the pine straw over the water onto the green. Like I said that could of been bad.
The other was really the luckiest (and look I realize nobody cares really what I did - just sharing the fun). On 16 to a bottom left pin I missed right of the green on my tee shot. Just short of the bunker however. The caddies started laughing, as they do, and said it was going to be fun. My caddy told me I needed to chip across the length of the upper section of the green and kill the ball into the fringe 1/3 the way down the left side. Then and only then would I be able to get the ball close. Pin was close to Tiger's famous hole out position when he chipped from the left rough. An out of body experience later and I had a tap in over.
The other real playing highlight was a 2 on 12 to a back right pin that looked in the hole going by. Admittedly that felt cool.
For me by far the hardest holes were 11 and 18. 11 really requires a perfectly executed cut (with driver) from the members tees or you risk running out of fairway. 3 wood is a safe option but the result is a butt clenching hook lie of an approach with a mid to long iron and water left, of course. The bail out to the right leaves a ridiculously hard chip with water behind. For me nothing about that hole felt comfortable, not once.
18 was the other hole that really felt awkward. The drive is tight compared to most and again it really requires a well executed cut from the members tees. I hit 3 wood in both rounds, both times into trouble. One on the edge of the bunker the caddy assured me I could not reach. He was right, I still had 1 inch to go but no play at all since that bunker is so deep. If I was playing multiple rounds again there and not controlling my tee shots well enough I might just hit 4 iron off that tee and lay up if I could reach the green just to stay out of trouble. Some holes just don't feel like they suit you.
In any case, yes, amazing experience. I also think that everyone would have fun there, regardless of whether you thought it was the best course on the planet or not, there are simply a lot of fun shots. No lost balls (well very few, but some water hazards of course). Quick pace of play, fun approaches and great fun chipping and putting. Even with all the changes that many of us might like to see done differently or even restored to something similar to the amazing original photos there is really a lot to like there even for the most picky of us. The best part might be the brilliance of the routing which sure makes the most of that crazy property.