Im just back from Mexico , and loved it .
Mexico definitely has a drug war going on at its northern border ( Mexicans appreciated Hillary Clinton's admission that the war is driven by US consumption of drugs and shot out with guns bought in the USA), as a tourist you will only notice a high police presence. The war is 1850km from Mex city.
You can get Air France flights to Mex City for €550- now and Delta has flights from €450- to some cities. I traveled from Puerto Vallarta via Guadalajara , Mex City, Puebla , Oaxacha and San Cristobal to Cancun . Cancun and PV have hotel zones that are just like the USA , you might as well go to Florida , but PV has a nice old town .
I loved the high middle of Mexico , the air is dry 26-27c and the evenings are cool 16c , perfect for the Irish , the arcitecture is more impressive than the old cities of Spain , costs are very low ( Mexico devalued the peso), and intercity busses are of a very high standard. People are friendly and do not hassle tourists .
pjq