I've made this twice for my husband who is from Colombia. The first time I made it we found it lacked in flavor, so the second time around I made some changes. I used 1/2 the amount of steak (but still used the same amount of tomato, onion, etc), eliminated the celery and used extra garlic and then also sprinkled garlic powder, salt, and pepper directly on the steak before searing. We felt that the beer didn't really add flavor, so I used red wine instead. This made a huge difference and it turned out excellent.
My Colombian husband has been talking about this dish for years so I finally decided to track down a recipe and make it for him. It turned out really well! I made it almost exactly as in the recipe (although I forgot the cumin). Both my husband and my stepson thought it tasted great and as it should according to their Colombian tastebuds. Red meat is not my favorite but prepared like this I liked it, too.