The food here is just ok. I have eaten at Abuelo's a handful of times over the years and the only meal that really stands out in my memory is the shrimp Veracruzano. I think their version of that dish is pretty good. Most of their plates fit the Phoenix Mexican restaurant MO: rice and refried beans with an entree that is fried and/or covered in cheese and chilli sauce.
The decor at Abuelo's for some reason reminds me of a Vegas casino. A little over the top. Kind of cheesey but still fun and nice it its own way. Service has always been good. If I remember right they have a decent bar, too.
This is not on my regular rotation but I am willing to go here if someone else invites me. For more authentic Mexican you can try Espo's down the street but you will not get the same level of service or ambiance.