We'll have to miss MechaCon this year. But we've been to all of them previously since 2014. My wife and kids are into anime, and they get to experience a lot that doesn't get wide run at more general comic-&-movie based cons. It's also an inexpensive con, a family of four getting in for under $60 on Sunday.
MechaCon has a great merch room. A lot of Japanese vendors selling hard-to-find (in the U.S.) anime merchandise. On top of that, a ton of local vendors show up selling general sci-fi items ... so the room is not 100% anime. Some of the Chewbacchus "krewes within a krewe" have a presence at MechaCon (e.g. Krewe Du Who for Dr. Who fans) and it's cool to see what they are up to off-season.