Funny, I mosied on over to the Prado forum from the 100 forum as I was curious to see how many threads down I would have to go before a post about that awful rear door came up. Sure enough, it was number 4 or 5 LOL.
My friend's parents had both a 2003 LX and a 2004 GX. The GX was purchased after his stepdad's phenomenal experience with his LX (it now has 320,000 miles) for my friend's Mom. The GX was an absolute disaster. Lots of electrical issues (this is probably not common) but her number one complaint has been that damn door. Especially after parallel parking in front of other tall vehicles.
It's a good thing they added the window option to the U.S. model for the new GX, as I do know several current or former GX owners who got very frustrated with it. As for his Mom, she has moved on to a 2011 QX56 and absolutely loves it, as do the kids.
In other words, while it may not be as bad as some people make it out to be, if you have a Wife and/or Children that will be constantly in and out of this thing, it *is* a consideration that needs to be taken into account.