Mootools?

Have anyone here tried it? What is your opinion? I'll have some heavy js work and I need a dependable dramework. Till now I've used GWT but I dont like the concept of generated code. Maybe my question is more like Mootools vs Dojo?

I find MooTools to be good if you have a firm background in Javascript and can interpret their code without much guidance. It looks wonderful as well and has some great effects, you just have to have a reason to use them. I can't compare it to Dojo however as I haven't used it. But I think MooTools is worth a shot.

Little late but thanks for the answer. For my project I stoped on jquery. I have a lot of js logic and controls to implement, for now I think it is acceptable.