never had a problem with my 2007, course i never had the top off. same so far with the 2012....no leaks from the top. couple of drops during the hurricane as i was driving through horizontal rain. closed the vents to the outside air and it quit. waiting to see what happens during the next deluge.
been reading about the leakage for a couple of years now. i wonder what the actual percentage of jeeps that have a problem caused by defect AND the number caused by not seating the top properly when putting it back on.
Personally, i think that Jeep as a product, overall, is great. I've had 2 Grand Cherokees, 2 Liberties, a TJ and now 2 JK's. Never a major problem with any of them.....and none of my Wranglers ever leaked. Just saying it might be a small minority that have problems but the owners are more vocal and rightly so.