Leonard M.wrote a review of Sterling Fusion Photon Dry Rope - 7.8mm on October 2, 2012
Familiarity: I've used it several times
I've now used these ropes in Rocky Mountain National Park (Spearhead), Black Canyon of the Gunnison (Comic Relief and others), and Devil's Tower (Mr Clean, El Matador, etc). They are a great choice when you need a two ropes to rap. Having the option to clip singly (half) or both (twin) is a bonus. These ropes are stiffer than other twins I have used. The stiffness has three significant benefits: (1) they provide more friction on raps (which can be an issue on skinny ropes), (2) they are less likely to get tangled, and (3) they are less likely to stuck when pulling them down off a rap. After a month of hard climbing they appear to be holding up very well. So far, these are the best twins I've ever owned (and I've owned about a 1/2 dozen in my life).