Not only is your property tax part of the maintenance fee, but so is the interest on the building's underlying mortgage, both of which are tax deductible. Additionally, that same fee covers your utilities - another separate bill you'd need to worry about with any neighboring condo.
Do be aware that the Doric is a co-op, not a condo, so there are a few differences. Because you are buying into the co-op as a shareholder, there is a board approval process. Also, subletting is strictly controlled, and in general frowned upon. Subletting requires a separate board approval, and subletting without approval can result in your losing your unit, and incurring considerable fines and lawyers fees.
Visit their website for more information - www.thedoricnj.com.