Complaining about not having instructions in my opinion is really ridiculous. Pretty satisfied and will keep buying. I also have Cobb hill Patrice flat shoes that are also equally comfortable and require a insert on left foot only midway thru day. The other biggest thing that I have see is it charges pretty fast to full charging. Weatherproof. So I ordered one for myself, adhered the flat cell phone magnet to the back, installed a second magnet base to my dash and now have the same in my car owing to the fact that my daughter blew my speakers playing crappy rap music a year ago. Unfortunately I am not happy that I have to return this and wait because I need to give it to the birthday girl tomorrow so I cant return it I have to go out and find a new container. The configurable DPI button is a bit fiddly for me to hit mid-fight so if thats part of your playstyle this might not be the ideal mouse for you (unless youve got a supernumerary mini-digit between you index and middle finger, that is). Excellent value, good fit. But in the end decided to keep them.