I recently visited Guadalajara and went to the Walmart Galerias on Av Vallarta to shop for some…read morethings I needed. Most Walmarts are about the same throughout Mexico. This one had advantages over some others because it is larger and with a bit more variety. Other than that I was not that impressed. Perhaps I'm comparing it too much to my hometown Super Walmart in the USA.
This Walmart is next to a Sam's Ckub and adjacent to the Galerias Shopping Mall. So what you can't find in Walmart, you may find at Liverpool, H&M, Aldo's, Carter's-Oshkosh, or one of the other mall stores. You can also eat for cheap at Vips, or go wild at Cheesecake Factory while you send your non-shopping friends to the movies.
The parking is paid, so get your ticket validated. On the plus side, some parking is shaded (a huge plus my Walmart ought to have considering the significantly hotter climate.
The selection is pretty good: groceries, home goods, over the counter pharmacy and hygiene products, automotive, gardening (plants and pots), apparel, shoes, the usual bakery, deli, etc.
I was impressed with the bakery... I tried some mini donuts which were horrible and I didn't even finish one. Their bolillos looked reasonable.
As you check out be sure to remember that they only use reusable grocery bags which they sell for a decent price. So bring your own, or buy them here.