So I'm almost a full week in and I'm loving 1.6.
The performance is great, though I don't know how people are pulling Quadrants as high as I'm seeing reported. I'm pulling Nexus One number, and that's fine with me.
The phone is consistently responsive and snappy.
It does tend to run a little hot, which has me consider dragging my overclocking down below 1Ghz.
The only recurring issue I've noticed is with the phone app. While on a call the app seems to fall to the background, so that when I pull the phone from my ear, I can't immediately hit a button or switch to speaker, and occasionally with the phone app in the background the other person can't hear me.
Overall I'm very happy with this ROM. Battery life is better, the system is incredibly responsive - just a little heat and a sporadic quirk so far keeping it from being 100% perfect.
Liquid Frozen Yogurt 1.71 (Smoked Theme)
Slayher LFY 1.0GHz Kernel