Just received it and I am very satisfied. Very good feeling in the hand, very beautiful and very responsive. Also, it doesn't need batteries because it has a built-in one and charges from the computer. The only thing I don't have an opinion on is its durability over time. If I notice anything negative, I will come back!

Rechargeable with built-in battery and charging cable that goes into the front part and when charging it is like a wired mouse. Smart. If it proves to be durable, it is a very good wireless mouse.