PCWorld reviews ModernMix, and gives it a 4/5!
"it reduces the number of times you have to traverse the two halves of Windows 8 (modern and classic), which is well worth the $5. Being able to run SkyDrive, Maps, Camera, and especially Solitaire in a window on the classic desktop is addictive (as well as more efficient) for desktop users. "
Read more: http://www.pcworld.com/article/2033442/review-modernmix-runs-modern-ui-apps-in-windows.html