I needed to buy one of this as using common mice caused me horrible pain.
The desired mouse had to be SILENT, bluetooth compliant, it must have 5 button layout and this one from mojo was the only offer on the market.
In general, I am satisfied.
I ordered this mouse to alleviate hand pain from working with a traditional mouse. This product is working fine and I can once again work several hours on my laptop doing precise graphical design projects. It is responsive to my settings and I like the quiet (non-clicking) buttons.