Some folks complain about EAA's customer service. Not, Tanfoglio, mind you, EAA - the importer. I really don't doubt these claims, although I have had a positive experience ordering extra magazines directly from EAA.
Still, I never put too much value or credence in "customer service" when buying guns. I purchased an AC556, and a few years after buying it, Ruger announces that it is no longer supporting/servicing this firearm. Colt is no longer capable of servicing many of the guns it manufactured, certainly not able to replicate the fit and finish that it once achieved on its Pythons. Boberg suddenly announces that it is selling out to Bond Arms - customer service is non-existent...for now.
My point is that if you think you are buying a warranty and customer service, then you are (IMHO) focused on the wrong thing. Buy the gun! If its a good quality gun and you like it, then buy it. And, buy all the spare parts you can for it. Because, some day, regardless of the manufacturer, I can assure you that there will be no CS for that gun. But, if it's a really good gun and you have spare parts, it doesn't matter.