Nissan CVT transmissions are known to fail too early, so if it made to 165K miles and was not serviced before… well, it’s good result, but it also means that likely the transmission is on its last leg
I would make sure that fluid used is the original Nissan’s fluid (NS-3 for that year I think) and not a “compatible substitute”, also I see no reason for more expensive “drop pan” option, as AFAIK it has no fine filter, but a simple “sock”, simple drain&fill will be cheaper and give the same result
from what I learned about Nissan CVT when I used to be a “happy owner” of 3 units, from which 1 had a hard failure and 2 were traded in pre-failure state, is that these CVTs get damaged the most when doing jack-rabbit starts or driving over ice - anything creating jerk-load on the pulleys will make them fail substantially faster.
“slow and easy” is the name of the game to get more miles from this car