Ok ,so after looking at this "great" version of Android ,i realized that Google disappointed me once again !
1: Takes forever to charge ! [4:40h from 10% compared to 3h max with 2.3.7];
2: Effects work and don't in camera ,not to say video is recorded in a weird way when finally using effects !;
3: Takes forever to boot ,what the ... ??? it used to take 8 seconds with CM7 to boot up ,with 4.03 takes about 20-25 ,why the delay ??;
4: And i know this is not Google's fault ...no actually it is for making this system so fragmented ! > not all the apps work X(
Conclusion ...my conclusion : [I9023] For the moment i don't think it is a good idea to upgrade ,it is a nice and very smooth OS ,unlike ginger ,but at this moment it's not optimized for our NS's & like you well know ,we'll have to deal with this ... until Google releases some bug-fixes ,and there will be many