Been using it in my Rockboard 4.2 for over 2 years now. I have a BOSS RC-600 looper on my board along with 11 other pedals, and it makes everything very convenient and tidy. No added noises to the system, no complaints about build quality. Bought an XLR reverser adapter cable so I can connect 2 mics to it, two of the 1/4" outputs are routed as L & R mono outputs from RC-600, and the third jack output is for Stereo Headphone Out, very convenient. 3x 1/4" TRS outputs can be turned into 6x mono in-outs using Y-splitter cables, which is great versatility. The added 9V output great for powering any extra pedals that are not permanently on my board that I might be using or trying out. It saves a lot of time and mess - no fiddling about with cabling, going under the board to connect or route something - just plug what you need in the MOD 3 patch-bay, connect the power cable, and everything works.