I was pleasantly surprised at the quality of this product. I tested the sound both on Quicktime via the internal Mac mic, and via the SudoTack Condenser mic. 5 and bought these in a 2/3. Mire comfortable sole than ultra boost No big deal, a few taps and its straight again, albeit minus some coating. Tutto perfetto! Now equipped with a stereo microphone, DCAC EX is a significant improvement in making those calculations and attempts to autocorrect for positioning, aiming and phase. She said the size was accurate and the clips and velcro holds snug. I dont even have anything left to say, ive just enjoying typing on this keyboard so much. (If I were to stick with this style, though, I would definitely exchange them for an 11.