Yes — the Mirka DEROS II 5650 is worth buying if you need a professional-grade random-orbit sander and can justify the £641.07 price. It is expensive, but the combination of a 400W brushless motor, 5,000-10,000 RPM under load, dual 125mm/150mm pads, and a 1kg body makes it a proper long-session tool rather than a disposable DIY sander.

First impressions: built like a trade tool, not a weekend accessory

Mirka has aimed this squarely at professionals and serious hobbyists. The headline figures tell the story: 400W, 20% more power than the previous generation, and a compact 10cm height profile. In hand, that matters because sanding is about control and endurance as much as raw abrasion. A 1kg sander is far easier to guide across oak, birch ply, softwood, or filler-heavy drywall patches than a heavier machine, especially when you are working overhead or on large panels.

What do the dual pads and 5.0mm orbit actually do?

The included 125mm and 150mm pads make this more versatile than a single-pad sander, and the 5.0mm orbit sits in the useful middle ground for stock removal and finishing. That orbit size is aggressive enough to flatten marks and level surfaces, but not so large that it becomes sloppy on final passes. For UK workshop work, that means it can handle everything from sanding pine carcasses and MDF edges to prepping hardwood furniture parts and smoothing plasterboard repairs.

How does it perform on dust extraction?

This is one of the main reasons to buy Mirka. The integrated dust extraction system is designed for Abranet mesh abrasives and, when connected to a vacuum, it removes up to 92% of dust particles. That is not a minor convenience; it changes the quality of the job. Less dust means better visibility, less clogging, and less abrasive waste, which is especially important when sanding resinous softwoods, painted surfaces, or drywall compound. For anyone running a tidy workshop with extraction already in place, this is a major advantage.

Is the build quality good enough for the price?

The build spec suggests yes. The brushless motor should mean better efficiency and less maintenance than brushed alternatives, and the compact, lightweight body is exactly what you want from a machine intended for repeated use. The included Mirka transport case, two sanding pads, and pad savers add practical value straight away. That said, the price is the obvious warning: at £641.07, this is a serious outlay for a random-orbit sander, and it only makes sense if you will use it regularly enough to benefit from its ergonomics and extraction performance.

How does it compare with cheaper alternatives?

Against the Makita DBO180Z at £79.99, the Mirka is in a completely different class on price and intent. The Makita is a far cheaper 18V cordless option, but it does not compete with the Mirka’s 400W brushless output, dual-pad system, or dust extraction focus. Compared with the Bosch Rout POF 1400 ACE at £238.99, the Mirka still costs far more, so the decision comes down to workflow: Bosch and Makita suit broader DIY budgets, while the Mirka is for users who value finish quality, dust control, and reduced fatigue over upfront cost.

Is it good value for money?

For the right buyer, yes. The current price of £641.07 is 13% off the £733.92 RRP, and the price data shows this is the all-time lowest recorded price. That makes now a sensible buying point if you have been waiting for a pullback. But value here is relative: this is not good value for casual sanding, and the #143,408 sales rank suggests it is a specialist purchase rather than a mass-market one.

What should you watch out for?

The biggest downside is simple: price. The other caution is that the performance gains depend on using the right setup, especially compatible Abranet mesh abrasives and proper vacuum extraction. If you only sand occasionally, or you do not already own decent extraction, much of what makes this machine special will be wasted.

Bottom line on the Mirka DEROS II 5650

This is a premium sander for users who care about finish quality, dust control, and comfort over long sessions. It is not cheap, but the specification, 4.7/5 rating from 11 reviews, and all-time-low price make it a credible buy for serious woodworkers, cabinetmakers, and renovation users who will actually use it hard.