We opted for a mesh chair for our home office. Wanted the ventilation and the lighter weight. We've only had it for a month but so far seems good. We bought the extended warranty at the recommendation of the sales person who says these kind of chairs begin to have problems at the seams after a couple years.
This chair has excellent features (adjustments and controllability) and is physically supportive. I am concerned with the durability due to its plasitic and nylon mesh construction.