I am a roughneck in a well servicing rig.
I have been using these boots for the last 3 months, they have nice ankle support and it has saved my ankles a few times.
They are not as comfortable as they claim to be, I had to use gel insoles for extra cushion, I work 12 hours a day in an OIL RIG.
They are slippery in the work floor in the oil rig.
They sure can stand aggressive fluids such as oil and salty water and other chemicals  for well control. Nice tanned leather.
 The tongue is a little bit too slim to cover the lacing area and it can let some fluid get inside (just a few drops), of course, they are not supposed to be waterproof, but I think a wider tongue would have helped keep my feet dry.
I would recomend this boots for a different kind of job other than oil rigs, they are  tough and good looking.
The boots arrived 15 days sooner than expected, all the way to Mxico. And a few days later, I got a refund for "Export fee reduced". Cool.