The Cooler Master MasterMouse MM830 is quite an enormous mouse, both considering its physical size and technical specifications. As for the former, it's a rather bulky, palm-grip oriented, right-handed mouse. By its size, I would say it'll mainly fit users with medium-sized hands (about 18 cm hands, plus or minus a few cm), but there will always be exceptions. Materials are just fantastic on this product. Both main buttons are made out of PBT, which means they have a nice and grippy, rather coarse texture that won't get all shiny and flat after even many years of hardcore use. Other parts of the surface are great too; overall, it feels nice to hold it in the hand.

Thankfully, Cooler Master greatly increased their build-quality game within the last few years, and the MM830 is ridiculously good in this regard. I usually find 1-2 things to nitpick on with gaming mice, but there are literally no negative points here. Weight-wise, the MM830 is certainly a very heavy mouse, and unfortunately, there are built-in weights inside that require a full disassembly to remove. Certainly a negative point, I'm really confused about this choice by CM.

Buttons are decent on this mouse. However, the main ones and the scroll wheel could use a bit of extra tactility and snappiness. The hidden D-pad sounded like a cool feature at first, but I'm not sold on its functionality. I'm convinced that a standard layout (with standard switches) would be much more comfortable to use. Of course, these buttons themselves work great, but it was sometimes hard to reach and actuate them.

The MM830 features a top tracking unit as the PixArt PMW3360 is still one of the best sensors out there. It's raw, responsive, and without any unwanted acceleration or smoothing on the reasonable CPI steps. Unfortunately, the polling rate isn't the most stable on 1000 Hz as it has some periodic outliers that are due to the number of LEDs inside the mouse, and their frequency interferes with the sensor. This issue doesn't seem to cause any problems in-game, but as for me, I'd definitely stay on 500 Hz instead, which seems absolutely fine.

Mouse feet are good on the MM830 even though their friction could be lower for my taste. For factory-stock models, they are absolutely fine, though. What isn't fine is that there are no replacements provided with the mouse, so once these wear out, you have to look for aftermarket ones. As for the cable, it's surprisingly good. It doesn't generate a lot of drag and resistance and is quite flexible, which is rare with braided cords for sure.

Portal is definitely a good driver application by Cooler Master. Though I can nitpick on some points, it's a fast, intuitive, and functional program. It doesn't minimize to the system tray, so once you close Portal, it doesn't consume any resources in the background. RGB functions are vast on the MM830; there are loads of effects you can choose from, and you can also individually control all four of the lighting zones. The effects look great, the lighting is bright, and the colors are nice and vivid. The MM830 is definitely among the best in terms of RBG support. There's also an OLED screen on the left side of the mouse you can totally customize to your liking. It can display resource usage, current CPI, polling rate, lift-off distance and much more, including custom bitmap images. I'm sure this function isn't necessary on a mouse, but it looks cool nonetheless.

There really are a lot of great mice to choose from in this price range. However, the MM830 has some rather unique features most of the competition does not. If the shape and weight suit you, and you're not bothered by its small quirks, the MM830 can be the perfect mouse of choice.