I went specifically to get sushi quality hamachi (from what I understand, you want it to be frozen to avoid parasite risks). I also bought some roe.
They have "regular" (non-sushi grade) frozen fish kept at 0 degrees or something close to that as well as an island freezer at the middle of the store for the sushi-grade stuff kept at a -20+ temperature.
They recommend thawing by putting in the refrigerator one day in advance. That worked for me. Both seemed to be good quality in raw preparations.
The hamachi was priced by the ounce. It seemed pretty similar to what I would have paid for fresh, non-sushi grade stuff.
I didn't notice any textural issues with the thawed hamachi. In the past, I was able to detect textural differences when doing a side-by-side of Sitka Salmon Shares king and Dirk's never-frozen Atlantic salmon (I know these are two different species). The previously frozen product was ever-so-slightly mushier (both in cooked preaparations). But I served the Wixter stuff raw, so I can't really compare.
Other things I remember:
- The regular frozen stuff seems to mostly be portioned in 6 oz serving sizes. I can imagine some would appreciate that convenience.
- Their frozen shrimp are from SE Asia
- The clerk seemed pretty knowledgeable about the product.
- They had an array of canned Spanish products (anchovies, octopus, cockles, squid, etc), that seemed among the more interesting items in the shop.
I think prices were either in line or cheaper compared Dirk's, Whole Foods, or The Fish Guy.