(Update)This mouse suddenly started working for me after months of the frustrations I listed below. The cursor will flake out every once in a while but it's usable as a mouse at this point. I am still going to give it a low rating because the battery only lasts a few weeks at a time and this is unacceptable to me. If this doesn't bother you then you should buy the mouse today.(Original Review)I'm a pro photographer and my computer is as important as my camera. I work on a Mac and I was looking for a great mouse, Sadly this mouse is barely functional  on Adobe CS4 products if you are using new hardware and new software. For the folks working on older equipment I can't speak for them. The mouse software locks up my Adobe software mostly Lightroom and Photoshop, who do I bill for down time, my customer or Logitech, looks like my customers and I lose here. However InDesign does not seem to suffer. Apple Safari does not work if you want use the scroll wheel but it's still mostly functional. General use is very unpredictable, you will need to adjust to the mouse rather than making adjustments to suit your needs.A few positive remarks: The build quality is top notch and the mouse is more comfortable than anything else I've used for important tasks. A very nice feature is it uses a AA battery so you can toss a freshly recharged battery while you recharge the one that you used up. I typically get about 4 weeks per charge working 7 days a week.Save your money and wait for an update in a few years. Stick with Microsoft mice for now, even though they are a bit irritating they only cost $30 and that's $70 less irritating. 

Question: How is the new mouse?
Answer: The cursor will flake out every once in a while but it 's usable as a mouse at this point