At about 110k miles the AC went. The dealer killed me on fixing this problem costing me $1500.
Otherwise nothing beyond brakes and batteries for the first 100k. The tires, Michelens, kept good tread until 105k miles.
This car never let me down and I would buy another Sentra without hesitation. I did perform all the required maintenence until 90,000 miles and rotated the tires every 5000. I wouldn't hold the AC against the car. I thought the dealer was a jerk.
I bought a 1991 Sentra XE Japanese built brand new and I definetly concur with your evaluation. I love my Sentra and recently bought a used 94 Sentra to keep it company.
My 94 at 111,000 miles just lost the A/C. Claims of a receiver/drier & condenser failure brought forth an estimate of $600+ to repair. I'm done with all of the cost.