I don't have a 50, but someone will chime in about it's use soon.
Something you have to understand about reviews that aren't published in national magazines. You never know the author or their skill level, the settings they made, coil size, or location. They could be a shill for another company and bad mouth the detector you are researching. Even the reviews that are published they tell about the features and how they are best used to your advantage. It is in the field test when they report on finding things is where story telling can come into play. Maybe too the author might have had a bad day and didn't get the coil over anything really good. If he never found a gold ring, does that mean the detector isn't capable?
I can tell you that the X-Terra 50 is a very nice detector and you would be happy with one.