Took my 2007 3.5SE in as the transmission for the most part seemed OK
On one occasion it seemed to slip as there was a delay between when I was completely stopped to applying the gas (delay going into gear).
Also I do a lot of stop and go driving and for a couple of years seemed "rough" in stop and go traffic (applying gas) and shuddered quite a bit.
Took it in recently and was told it needs to be replaced.
I bought it in June 2007 and only 70,000 miles on it
Got it back and definite improvement
Got another 1 year/12,000 warranty on the replacement but hope it's OK beyond that