My husband and I had seen Sheffield Mine featured on the travel channel, like so many others and we had planned our vacation not just based on the show, but our love of playing in the dirt. We did our research, read all the reviews so we were prepared for extremely rude people, sneaky employees and jaded instructors. Our experience at Sheffield was nothing to write home about. And what I mean by that was that is was just AVERAGE. We knew what we were paying, the hours and the stones we would be searching for. We arrived right before it opened. The staff was friendly enough. I did not find the instructor to be overly rude. Just doing his job. The employees walking the flume were pretty average. I did not have anybody just grab my tray and dump it. I do find it odd that even though rubies are notoriously more rare than sapphires that rubies were the only thing we found. No sapphires were mentioned at all. So I do have a suspicion that some sapphires were probably dumped after thoroughly cleaning the trays. And they do stress cleaning. We visited the Mason Ruby and Sapphire mine the very next day, and had much better results for about $10.00 more. And we were there from 8am to 5 pm. Would recommend Sheffield if you only have a couple hours and aren't looking for anything worthwhile. Just to kill time.