First, the place does only feature appetizers, which was fine for our group, so I'm not basing this review on lack of entrees. We knew the menu was limited and the area is designed as a happy hour gathering sort of place, but we had no idea of the quality (or lack thereof) of Vince Neil's Tres Rios Cantina.  \n\nWhether or not Vince Neil has anything to do with this cantina, it's gross. No, seriously, it's bad. I'll give full disclosure here - Mexican food is not my favorite - but I DO know quality ingredients from crap. And I also know good service from bad. Also, I'm a pretty patient and flexible restaurant-goer, so I'm not just nit picking here.\n\nOkay first the service - the night I went it was awful. I suppose it wouldn't have been so bad had it been terribly busy, but it wasn't. About 2/3 of the place was empty (and this is just the front \"cantina\" part - the restaurant behind it has actually been closed indefinitely.) It took about 10 minutes for the waitress to show up and when she did she handed out menus and was gone for another 10. We got our drink order in and when they came the margaritas were terrible. I'm not sure there was even alcohol in them, but an extra shot of Patron made it all better. I'll cop to poor ordering on my part - it was a happy hour margarita so my expectations shouldn't have been too high. The Cadillac was good though - not part of the happy hour, but it saves you from buying the extra shot. Not only does it save money, but time too because it took about 10 minutes to actually GET the extra shot. After the drinks we ordered an array of apps - the waitress forgot two of them, but we were starving so began devouring what we did have. \n\nTaquitos (beef) - decent. They had a little kick, which was nice. Came with sour cream and guac. Not much to complain about there.\nFish tacos - STAY AWAY. It's fried fish nuggets with some coleslaw. No spices and no flavor. \nNachos - lacking flavor and featured liquid cheese - not grated cheese that had been melted, but seriously bland cheese sauce that doesn't even compete with stadium nacho cheese.\nQuesadilla - not filled even half way and flavorless.\nPoppers - meh. They are what they are.\n\nWe were winding down the meal and our waitress approaches to announce \"Okay I'm going home\". After an awkward look she continues \"so if we could settle up that'd be great.\" I'm not saying she shouldn't have tried to close us out but her approach could have used some polishing to say the least.\n\nBased on the other reviews I've read, mine is about on par. It's not the fact that it's a happy hour place that only serves apps and drinks that gets a thumbs down, it's the fact that the service is awful, drinks are watery and food leaves MUCH to be desired...like flavor.\n\nThere are several places to eat at the LV Hilton - and zillions on the strip. My advice? Find one of them and bypass this place.