It does what you expect. Have to align it a little while closing to zip it up easily but it works. I’d buy these for other Logitech stuff.

Ive been using trackballs for a very long time. I have a tech backpack that I use for work. While the laptop compartment has good padding to keep it separate from the larger compartment where I carry my tools, the smaller compartment where I was storing my trackball didnt seem to be as protected either from the tools inside of it or anything outside of the backpack that it might bump into or fall against in transit from one customer site to another. I didnt even know these types of cases existed until they showed up in my Amazon Recommendation after Id bought some new/upgrade balls for my existing trackballs. And, as soon as I saw that the cases existed, i knew I had to get one because it would address the growing concern that I had that the trackball might get broken at some point. The hard case gives it the protection it needs. And, because of its clamshell design, you can also just open the top and leave the trackball in the case while you use it.

Nice case but listing said it came with extras. There were no extras but its a good case for my trackball.

Good

I love this mouse! I spend the vast majority of my work hours using a computer either reading documents or writing and editing documents. My second wired ergonomic mouse finally died, and my employer had some weird style that would require me to move the roller ball with my fingers instead of my thumb. After a decade of using my thumb, my brain refused to adapt quickly enough to the new style and it made my hand ache. This wireless mouse was the perfect replacement for my dead mouse. I bought it with my own funds rather than suffer with the wonky option. After a couple of months using it 5 to 6 days per week, Im super pleased. I do have larger than average hands for a woman with King fingers. My glove size is 9 if that helps anyone judge how the mouse might fit their hand. I think that someone with a tiny hand or short fingers might prefer another style. I did buy the carrying case, and I will be taking my mouse on work trips. Its worth the space that it will take up in my rolling computer case.

The case is almost perfect. It is exactly what I was looking for to protect my MX Ergo when I travel for work (which is a lot). Unfortunately, I have the MX Ergo that has the additional wedge for increased angle and, unfortunately, this case will not accommodate the wedge. All-in-all, a great case, but it does not fit all MX Ergo (which I found out after the return period passed).

Everything fits in case. Case is solid.

I travel quite a bit with my beloved trackball. I really feel like I have responsibility to go out into the world and let them know what they dont know, the joys of trackballs. Im often met with quizzical looks and bewilderment, people struggling to determine what manner of device I possess. Upon knowing, they find it incomprehensible that such a device could be functional. its a heavy burden, to be sure, educating these poor lost souls. Nevertheless, I take it on willingly. But if Im going to travel with it, how am I to protect it from the horrifying buffet of hazards along the way? I often ride a motorcycle, it gets banged or crushed in the luggage. Heavens me, what to do? I have to get this device to the public so they, too, can buy one and live fuller lives. A soft case isnt going to stop it from being crushed! What you say?!? You have a hard case with a soft interior?!? How is that even possible! Anyway, long story short, Im saving lives out there, and this hard travel case for my Logitech M570 supports me in that noble goal of trackball evangelizing. Please, anyone reading this with a mouse in your hand. Stop it! Theres so much more for you in this world!

when traveling. Mouse fits nicely inside and keeps it safe when having to travel on business.

Bought this for the M570 that I have and the new M575 that I bought. The M570 fits just fine. The M575 not so much... The M575 extends a bit beyond the front of the case by the buttons, the bulge for the trackball does not fit into the cutout for it, and the tail of the M575 is just barely over the rear of the case. Trying to fit the M575 into the case results in finding out that the area for the ball to fit into the top of the case is in the wrong place. The M570 fits just about perfectly. No issues. Since I have both I guess Ill keep it and look for a different solution for the M575. I was hoping to take the M575 on trips in order to be able to use the Bluetooth connectivity with a computer or iPad. However a different case will be needed.