Just to return in topic...
these are the issues I have found so far (with the 18v4 build/kernel, default settings and vsel):
-phone runs smooth for hours, but when it starts lagging the worst application is the contacts/phone app: making and answering a call is almost impossible
-there are seldom reboots but not really bothering; I'm using Italy 2.51 baseband (by the way, the baseband changer app shows 2.51.1, is that an updated version or just the same one?)
-lately I noticed a battery drop as well, after 60% it goes to to 49%, but did not have it before so I think it is also due to battery life
-the animated wallpaper selector found in modified gapps does not install within the zip and, installing it manually, it crashes when I select a wallpaper
moreover, I wonder why there is no way to import any working voice dialer over the very bad JB one... the old GB one used to work perfectly and they say the ICS version of the new one (worse anyway) was at least working