I tried out the amber ones for soccer and a running in general.
As has been mentioned, because most people don't use them often, the trials last a long time. I generally only used them for 1 soccer game a week, and as most people wear contacts for 1/2 to 1 month, or 15 to 30 days total, that's only 1 pair every half year or so at my rate, especially considering they only wear them a few hours a day rather than all day long.
Pro: they seemed to reduce the total amount of light and glare, which helped a lot on sunny days. Green grass was really pretty, too.
Con: the color distortion proved more problematic than beneficial. At times I couldn't tell which team a person was on and would occasionally pass the ball to someone on the wrong team because of this. However, the games were pick-up and we just sorted people by light and dark clothing, so I'm sure that wouldn't be a problem in more standardized games with strict color differences.
I don't know of any patients who actually bought more than a box.
I think it would be more practical to sell contacts that only reduce the amount of light rather than change the colors, as that is what was beneficial to me. Suncontacts. There might be a few troublesome times, such as driving through tunnels or enclosed parking structures, but I would definitely wear them if I was planning on being outdoors most of the day.