The French cycling blog VELOTECH tested the SOLESTAR BLK and had very favorable results.

For the reviewers the volume occupied, stability and grip of the insole in the shoe are noticeable immediately. For them what is most key is that the SOLESTAR BLK insole insures a perfect support for the plantar arch.

It was noted that thanks to the it's technical build and materials, the insole not only offers support and comfort but also optimum power transfer to the pedal and cycling motion efficiency. For them, "It's a wise investment. The gains from the product are quickly noticed."

Overall for VELOTECH, "the test is very favorable and it is unimaginable to part with the insole now."

You can find the full article in French here