Well as u can see by my signature I am a huge supporter/user of eclipse
I haven't flashed nitros newest creation (1.3rc2) yet but I hear good things

I went from eclipse 1.2(official) to this liberty build.
The only.problem I have had with eclipse(and I haven't seen anyone else really mention it) was very very low gljellyfish scores on smartbench 2011. Which was also noticeable when watching Netflix movies I would get BAD pixilation(blurry) during ANY type of action scenes and sometimes during calm scenes.
Its a weird little bug...sometimes it wouldn't show itself until a day or two after flashing. Which makes me think its something I did somewhere but I hadn't done any edits or tweaks or anything. Just kinda happened.
not a huge bug but it bothered me. Since almost every time I thought it was fixed it would come back lol
This liberty build is great tho. So far my only problem is root browser(comes included w/ liberty rom) keeps force closing on me. I'm gonna reflash the rom tho as I haven't seen anyone else mention this.
performance is phenomenal on both roms. But I haven't seen the little bug I mentioned above on liberty at all. And it seems the edits to build.prop that come in liberty are helping with video performance and picture taking.
It also has a nice amount.of customization features. U can change lockscreen, add/swap certain apps like music, gallery, message app etc...
And one.of the features I am ecstatic about is the screen shot button added to the power button menu. Very cool to be able to take a screenie at various points. Just long press power button and choose screen shot. Very neat.
I recommend highly that u check it out. I think u will enjoy it