I like this mouse--I really do. And this would be a 5-star rating, if not for 1 MAJOR issue. The issue seems to plague all of these mice (mouses?), given enough use. The middle-click. With my first mouse, the center wheel no longer clicked when depressed after around 2 weeks. I returned it and (eventually) received a replacement.
I was perfectly happy with it, but after around 2 months, it, too, failed. I have not yet attempted to obtain additional warranty coverage, but I suspect it an impossibility, as I've long-since thrown out the packaging and receipt, and it is not on file (As an infrequent I've never joined the "rewards" club.)
Please note, as a software engineer, I am quite a heavy user of my computer. However, as this is a travel mouse, odds are good that even a light user will have it sloshing around a briefcase or backpack. This is definitely a fault in the design or manufacturing. I've had a Logitech Marathon M705 for 5 years now, which has seen far more and heavier use than these mouses have in their short lifetime, and it has had no problems with the center click.
I really do hope that an improved Insignia branded bluetooth mouse is developed and released. It is a very nice device being sold at a very nice price. The ergonomics of it are wonderful, given its size. The back and forward (side) buttons are wonderful, and essential for any mouse I purchase for my work. The multiple-DPI setting is helpful for graphic artists and/or gamers. It connects quickly, and has a surprisingly long range for a low-cost Bluetooth device. I couldn't recommend it enough--if not for the early loss of functionality. If you're willing to make returns and obtain warranty service for this, you can't beat it for the price, or for even for a higher price. Alternatively, if losing center click won't disrupt your workflow, you've got nothing to lose. However, I am a heavy user of it, and it really is unacceptable. I can't give you a "yes" or "no" on whether you should purchase this mouse; however, I hope to have given you all of the data you need to make the determination for yourselves! Feel free to comment with any questions you may have about the device, and I will be more than glad to provide answers!