Bests & Worsts Reviews from Amazon

I have a M705 mouse at work that I absolutely love. I've always wanted the same mouse at home, but could not justify it until my current one died. I will stand by the fact that I love my work mouse. So, why am I reviewing this one so low? Simply because it is not the same mouse. If you look for mice on Logitech's website and then pull up the "for business" tab, you will see that there is a blue version of this mouse and a black version of it. Both have THE EXACT SAME MODEL AND PART NUMBER. This would not be too bad if they were the same mouse, but the blue version, which I have at work, has an additional lower thumb button. This is the main reason why I wanted this mouse when I bought it for work years ago. I tried working with Logitech's support to see what I need to do to get the blue version. Their response was that the blue version is an older model and is no longer available...yet they have it on their website. I actually had to send their support screen captures of their own website as they were insisting the blue version is not available. I do not blame Amazon for sending me an incorrect product as there is no way for them to know the difference when the model and part number are identical. Logitech really needed to change the model number so retailers would know that it is a different mouse. Through additional research, I did find that the M720 is very similar to the blue M705 and it has the lower thumb button. So far, it is a comparable replacement. Please note that I had to do this research on my own. Logitech's support made no recommendations. I was debating about changing brands due to the poor support I received, but they do have other companies beat as far as quality/price.