I think that they are a WONDERFUL idea! I was shocked by how small they were, but found that the fit nicely over both my hands and my husband’s big “manly” fingers. While they worked great, and were easy to use, I found that the one I tried broke in a particularly tight contact (I have an inter-proximal filling on that tooth). I know that the final product will be considerable stronger, so maybe that issue will be resolved then. But overall, I think they are effective and fun. I will be excited to see how the product will develop overtime, especially the flavored ones. I am a fan and will be keeping an eye out for future developments!!