I bought this as a replacement adapter, and I highly recommend it.
I had originally purchased another Xbox 360 Slim adapter through another seller. It worked well, but its noise level was slightly higher than that of a Saturn V rocket taking off. The adapter stopped functioning after a month, burning out and taking a fuse with it.
So I specifically sought a different brand, and Lavolta turned out to be a great choice. This adapter works well, is nearly noiseless, and it's almost like having the original adapter that came with my Xbox 360 S.