The Ergohacks Verdict

Let’s get this out the way. This mouse screams high build quality. It’s got arguably the best sensor on the market and almost more importantly feels solid and strong.  It has ergonomic indentations that ensure a comfortable fit, a high DPI that cuts back on repetitive movement and sharply increases precision and it’s programmable buttons make it easy to personalize. Computer peripherals have steadily decreased in cost over the last year and although the RRP is around £50, it’s currently available on Amazon for £37.99.

The Castor is an excellent choice for anyone who does a lot of work with their mouse. It falls firmly in the simple-is-best camp and handles exquisitely well. I’m going to be sticking with it as my daily driver for a long time to come. Highly recommended.


Buy it from Amazon

Price: RRP £37.99 (RRP £49.99)


Sensor: PMW-3310 IR LED with adjustable lift off distance
DPI: 50 to 10,000
Tracking speed: Max 5.45m/second
Internal memory: 128kb for 5 presets
Internal processor: 32bit ARM
Polling rate: Adjustable to 1000Hz up to 1ms response time
Right hand optimised
Buttons: 6 programmable
LEDS: Two with controllable colour and pattern.
USB: 2.0 Plug and Play
Cable: 2m with braided reinforcement
Macro recording: Yes
Size: Max 122 x 70 x 40 mm
Weight: 93.8g without cable and 141.5 with cable
Warranty: Two year guarantee EU and 1 year US and Asia covering faulty components or manufacture.


The mouse is USB and requires a free USB 2 port and to get the best out of the sensor a decent consistently surfaced mouse mat.

ergonomicBuild quality

About Mionix

Mionix is a Swedish firm formed by Peter Nygren in 2007 with the aim of specializing in gaming mice. They’ve expanded somewhat and now make a range of mice, a mechanical keyboard, mousemats, a headset and mice feet.

We based our Ergohacks Verdict on 18 months weeks of tinkering, testing and using The Castor kindly provided by Mionix. This product remains in daily use.  This article was first published on 3 March 2016 and last updated on 14 September 2017.