Checked this spot out this past Mexican Independence Day due to the good reviews. It's located in…read morethe Zona Rio area, which is an area packed with very well-regarded, highly-rated restaurants in TJ. The restaurant is located directly behind the TGI Friday's on General Rodolfo Sánchez Taboada Boulevard.
Got there around 1:30 pm, not too long after they opened. Not many people in there, though that wasn't surprising given that it was a Monday and a federal holiday. One thing I love about Mexican fine dining restaurants is they tend to be very lax on dress code; I was dressed casually but that wasn't a problem. I don't think they technically have a dress code, though a comparable fine dining steak restaurant in the U.S. might not have let me in given that I was casually (although neatly) dressed.
Was nearly empty so was seated immediately. Waiter was an older male who spoke pretty good English. Was brought out Acqua Panna spring water while I looked over the menu. I first ordered a frozen strawberry margarita (209 pesos or roughly $11). The margarita was solid and tasty.
For my meal I decided to go with the petit ribeye (300g ribeye), which came with a complimentary side (chose mashed potatoes) and the soup of the day (potatoes and cream). The petit ribeye was 1389 pesos (~$73 USD).
While waiting for the main meal, they brought out bread and then the soup (which came with crackers). Really liked the soup. The bread was perfectly fine, though nothing special. They provided standard crackers but there were also some very large, circular crackers they provided that I didn't really like.
After finishing the soup and bread they brought out the ribeye and potatoes. Both were very good, the ribeye in particular was well-cooked and tasty. Not the best ribeye I've had in my life or anything like that, but it was solid. I also liked the spicy sauce and pico condiments that came with the meal.
The ribeye and margarita came to 1598 pesos total; after tip the total bill came out to around $100 USD. While I enjoyed the meal, I don't think I'd return to El Grill at that price point. I've had better steak/ribeye meals for less even in the U.S. and had better meals for much less in TJ. But the meal here was good and I'd still recommend for anyone who's never been, just as a place to check out. The waiter and customer service overall was great and very attentive.