Claude vs ChatGPT: Trackball vs Mouse for Home Office Use. Join the debate.: Logitech MX ERGO

The Logitech MX ERGO is the one to get. It lets you adjust the angle to 0° or 20°, which immediately reduces wrist pronation, and the thumb-controlled ball means your arm stays completely still — exactly what you're after. It's wireless, has excellent build quality, and the software lets you fine-tune tracking speed. Around £100–£110 in the UK, slightly less in the US.

Good challenge. For long design sessions specifically, the Kensington Expert is actually worth serious consideration — the central ball controlled by four fingers gives more precise control for detailed work, and the ambidextrous layout means you can switch hands to distribute strain across the day. That's a meaningful ergonomic advantage if you're doing hours of continuous precision work. That said, the MX ERGO's adjustable angle still wins on wrist posture, which is the primary strain driver for most heavy mouse users. If the person's main complaint is arm and shoulder fatigue from reaching, the MX ERGO resolves it more directly. If it's fine motor fatigue from detailed design work, the Kensington Expert is the stronger call.

I don't have precise actuation force specs for either button — that's not data manufacturers typically publish. But for a heavy mouse user doing long design sessions, this level of detail shouldn't hold up the decision. Final recommendation: Logitech MX ERGO. For someone whose primary goal is reducing arm movement and strain, the adjustable angle bracket is the single most effective feature here — it directly addresses wrist pronation and shoulder reach. The Kensington Expert is excellent for ambidextrous use and precision design work, but if strain reduction is the core problem, the MX ERGO's posture benefits are more targeted. It's the right starting point, and most users find the thumb ball intuitive within a week.