My only problem was that the screws were not included. I was so disappointed that I spent so much money on a brand new mouse, the return policy was over, and Id probably have to contact the manufacturer and get a refurbished one as a replacement. El envio a México desde las Las Vegas, rápido, llego en 3 días. This Wrist Curl Exercise is very good quality and hopefully least for long. Also very easy to install! Using the Mac console app with my iphone connected, I was able to see that the buds were now using the AAC audio codec, (whereas before they were using the old low-quality SBC codec) and sound quality and volume was now excellent. Lets talk about the mic on this thing. They are solid, and its nice to have a cord on only one side. I plugged in my 50% charged cell phone, and it charged up to full in about an hour and a half. If you plan on buying this, do not expect a life of more than a few months.