Took the two day tour for a group in peak season.
Pros : had a interesting guide who seemed to know a lot about the good eating places around and that was the limit of the kind of information he could contribute to.
Cons : stuck up rude drivers with a big attitude problem. One of them didn't even stop to pick us up from our stop (we were in the right location right under the big bus sign and during their operating hours)
Another issue was the the sheer lack of any signage as to where the pickup stops are. Most stops don't have have their crew to help out.
Conclusion: would only recommend it only to those who haven't found enough alternates to blow their money off in Vegas.