I revisited this place on a recent visit to Vegas as upon offering some dining options to people Thai sounded like the most exciting choice and I felt like if they wanted Thai in Vegas well then I'd have to give Lotus of Siam another try. I felt the exact same way on my second visit to the first. Nothing blew me away with deliciousness or culinary execution. I was most impressed by the menu and the variety of offerings and especially the presence of so many dishes I've never seen before on a menu at a Thai restaurant. I ordered the jack fruit curry (because I've never seen it before) and enjoyed it but wasn't blown away. This place is pretty far off the Strip so if you're not driving it makes it difficult to get to. We had a party of 8 which made logistics of getting us there and then back to our various destinations a little tricky. Plus when you come out here you really in the desert as we were left trying to figure out what to do to kill time for our 45 minute wait. If you have the forethought call ahead and put your name in so you don't end up in that same dilemma.
In conclusion, I said it before and I'll say it again? I would hesitate to call this the best Thai, it might be the most authentic but I can't really comment on that. It'll definitely give you a different look than your typical Thai place and if you really like Thai food that might be enough of an excuse to check it out.