Tried the new Taco Rosa in Irvine last night. Having heard so much about Taco Mesa (the team behind Taco Rosa) I was excited to finally taste what all the hype was about. After a 40 minute wait, we were seated and immediately given a complementary platter with a bean, lettuce, crumbled cheese and tortilla "torta" (not sure that's what it's called), escabeche and a little fried roll that I honestly couldn't identify by look or flavor. The carrots in the escabeche were firey hot, and unfortunately we didn't see our waiter or any water for 20 more minutes. Service is their main problem, we ordered an appetizer to share, and then dinner. All came out at once after a LONG LONG wait. First the bad news - the Carne Asada Taco was horrible. I've never had meat as flavorless as this, plus it was lukewarm on top of that. Now the good news, after the interminable wait, the portobello mushroom quesadilla (served on a whole wheat tortilla) was delicious. As was the blackened chicken burritto. My date ordered shrimp salad which was tasty and interesting. I liked the decor, it's upscale and modern yet has a subtle mexican sensibility to it. Taco Rosa is very close by, so I may give it another chance and hope that they fix the major service issues, but I certainly won't order Carne Asada again.