Guacamelee! 2 is very similar to the first entry, but improved in almost every single possible aspect to the point I think it's a shining example for the genre.
It's also harder, getting the true ending is akin to playing Super Meat Boy which isn't bad. The controls are very tight, even in chicken mode.
Also, I'm not Mexican so I can't comment on the authenticity of it all, but it seems like it was all made with love to me.