World Toyota and Sandy Springs are okay...
To be honest, no dealer is all that good at service -- all the best techs leave and open their own shops! Plus, the volume they deal with plus the "book" rates means they really don't spend the time a real problem requires. I was looking at both World and Sandy Springs when I bought my 4R, and I felt like I got treated well and fairly by both (World just had the exact truck I wanted, plus gave me a good trade-in on my X5, even AFTER we found out Global Imports had sold me a wrecked car without disclosing it -- NEVER EVER deal with Global!!!!)
Anyhoo, I've only gone in to World for the 5, 10 and 15K checkups, and all went fine (I hate that they only want to change the oil at 10K intervals though, I would have rather done an "extra" one at 5 just to make sure everything was nice and clean). Not sure what I'll do now that I've burned up my 3 free "services". But after my X5 fiasco, I ended up maxing the warranty on the 4R, so I guess I'll be seeing the dealer for the next 7 years or so for any malfunctions.
If you get to "know" a few people at a service center, it always seems like you get better service.