Had a couple of days to try our the cam. Have to lower my expectation compared to my DSLR...this is for my wife P&S pleasure...so these opinions are very subjective.
First off, I find that any ISO400 and above is not really usable to me...just too rough.
I experimented the various modes...from IA, scenes to the Record mode that enable more options. My exp is that the IA mode works pretty intelligent in getting out a decent shot but I have to turn off some settings as it does like to raise ISO even above 400...I have one shot that auto ISO to 640 indoor with flash on....killed the shot...good thing there is a manual setting or even a option to set max ISO.
I believe that the best mode for any non-photogs like my wife is the scene mode...it allows some form of control and yet able to capture quite a decent pic according to the scene set. Face tracking is pretty accurate and exposure is "OK" to my taste. The wide angle at 25mm definitely will comes in handy in grp shots.