My girlfriend and I went to Phnom Penh a couple weeks ago. We ordered the amok, papaya salad, and the fried chicken wings.
I've only had amok in Cambodia, where I enjoyed it very much. The amok at Phnom Phenh was a bit too lemon-grassy for my taste. If they cut the lemon grass in half, I probably would have enjoyed it more, though I'm starting to think that maybe I actually don't like amok that much, and my experience eating it in Cambodia was only enjoyable since I was on holiday.
The papaya salad was huge -- definitely enough as a starter for 4 people. Maybe even 6 people at an upscale place. I assume they make it that big to justify the $14 price tag. It would have been nicer to see it at $8 at half the size. In any case, the salad was good, and had some really nice pieces of dried pork. There were also lots of shrimp, which were nothing special. I would've preferred less shrimp and more dried pork.
The fried chicken wings were very tasty, and were the highlight of our visit.
The service was horrible. 30 seconds after getting our menus, we were approached by a server asking us if we were ready to order, followed by 4 other servers asking us the same thing in the 3-4 minutes that followed. Each time I asked for another couple of minutes, the servers gave me a look of annoyance, and walked away.
With a menu as extensive as theirs, how can anybody make up their mind that quickly? I also noticed the same thing happening to other tables. Mid-meal, I tried to flag down a waitress for some more water, and as she walked by, she stuck her hand in my face and turned away (e.g "talk to the hand"). She did return shortly after to ask what I wanted though. I don't expect good service at places like this, and I usually don't mind bad service at cheap divey places. But the servers' miserable facial expressions and the downright rudeness were a bit much for me. I guess it works for them though, since they always seem to by packed.
To be fair, there was one young waiter who looked happy, and one waitress who I saw smiling (kind of) to customers a couple of times. Neither of them served us -- only the misery squad did.
If I go back, it'll be for the chicken wings, and I'll probably take it to go.