I was looking at the infamous Superfeet red hots as well.
I did see the game changers on YouTube or some other site, but I was a bit skeptically of me molding them the wrong way. Do they give a lot of support, or do they just simply fit to your foot.
They're a pretty good concept but they didn't quite work for my arch, just not high enough. Plus they were quite wide and interfered with the shape of the liner.
I ditched mine after a few days on the slopes and got customs. Only a little extra cash and the difference is night and day. The customs not only support my arch properly but the forefoot shape is perfectly moulded too. And they are a perfect fit in the liner because they guy tailored them to it.
When you look at the shape of the customs and the shape of the game changers, they are not even close. Which tells you something. Probably better than stock though and might work fine for a different foot shape.