I have a PurePower supply for my Flatfish/Shigaraki dac. I can tell you honestly that I will not be listening without the battery again. The PurePower seems to enhance all the things I like about the 47Labs gear. Musical flow. I think it is well worth the money. It is also constructed beautifully and complements the 47Labs kit. Brian is also a nice guy. Very enthusiastic and rightfully proud of his product.
Chris
Chris