I need the adapter mainly for my Surface Pro 3, to connect it with other projectors or monitors. About the DVI interface of the adapter that works without problems. Even the connection to my TV (via HDMI) works fine. The sound is likewise transmitted via the Mini DisplayPort of the Surface and the HDMI port of the adapter and outputted on the TV; in this time, the speaker of the surface are switched off. When using the Surface (or another Windows tablet) is but to make sure that the connection between tablet and as TV is recognized correctly and completely, otherwise it possibly comes to problems with the sound. But that is no problem of adapters!
The product itself is well made, very easy to transport and thus also very good. The connection cable is just the right length. I would buy it again at any time and recommend it in good conscience.