Halibahs, I've been to HZ a few times as well. I mean, we're probably staying 3 nights, as it is a long weekend down here in Hong Kong, which honestly probably isn't long enough to split a stay.
I've also heard/read some spotty reviews on Amanfayun, which is probably the exception rather than the rule, but standards of Chinese "service" vary, and that is also a big concern of mine. It's also what keeps me from trying Aman @ Summer Palace...
The lakefront *is* very crowded, yeah.... discussions still ongoing with him as we speak...