First day review here. Spent a rather long time setting up than I would have liked. So let's start with the good-GOOD-the most comfortable mouse I have used. Long time g502 and g602 user here. I've been looking for a replacement for both, something with the functionality of the g602 and quality sensor of the g502. This is probably about as close as one can get. It has a wide range of functions despite the pitfalls of the iCUE software. The sensor tracks well and even in wireless mode (haven't bothered with Bluetooth) it's smooth and didn't miss a beat. Once setup (and figuring out how to get the buttons to actually work in iCUE) it's great and offers a lot of flexibility. Also note, it came with a full charge out of the box. The textures DO NOT feel cheap, quite the opposite. It's also easy to get the colors to match the keyboard or whatever if you are into that.-THE OKAY-It really needs more DPI options. The g502 has 5 settings you can adjust. It feels a little useless to have such a DPI range you can't actually use completely, but if I'm honest that's nit picking. Also, the scroll wheel won't free wheel or have left and right clicks. Again that's a nit pick, I don't care too much about those YMMV.-Really, let's talk about the bad iCUE software-I've used it for some time and expected the usual quirks about weird toggle switches but really, this was not a great experience, beyond that Corsair doesn't have (at least I couldn't find a How To, and everything else on the internet is for different mice. I had no problem figuring out how to assign buttons, it's that they wouldn't work, or would start doing something else when games were up. Really a huge oversight that Corsair needs to address asap.-Firmware updates and iCUE updates need to send promotes to the desktop! Seriously, I had to update iCUE, and had the "Macro Function is broken, please fix install of iCUE" message in the tiny corner. Turns out another update was needed, and amazingly the buttons that didn't work started working again. At least there was a fix, but I think something is still very wrong with button mapping. It should be separate from macros honestly.So for anyone coming here looking for advice on how to setup the buttons here's my advice.This should only apply to buttons you are remapping for keystrokes.1. Make sure you are completely up to date on firmware and iCUE software.2. Create an action and select the action.3. Choose which button you want to reprogram on the right side.4. BEFORE YOU DO ANYTHING ELSE. At the bottom where it says MACRO Select Advanced Settings and select "retain original key output"5. Select the MACRO drop down and select keystroke6. in the box perform which keystroke you want the button on the mouse to do7. on the Advanced tab for keystroke select retain original key output again. REMEMBER you shouldn't have to check retain key output for mouse functions (i.e. DPI changes, Back etc)This is a lot of work for something other companies do in seconds. now to my main issue..Selecting the mouse button to perform anything on the numpad didn't work at first.Selecting the mouse to perform a Function key, or any of the predefined options in the drop down (other than keystroke) doesn't work as of the time of writing this review (which has taken way too long)So stick with remapping with keystrokes for now I guess. Hopefully corsair will fix all this and I'll come back and give this thing 5 stars, because I really want to, but iCUE just sucks. But it can be worked around. I have attached some pictures of what my remap looks like and the key output options.Good luck everyone.