Oral-B iO 10 Gold Special Edition

Coolblue 5.2/10 review by Nako (title: "Zwarte aanslag ondanks goed onderhoud"; original Dutch). After prior good experience, black pieces came out while rinsing; kept brush head off the handle, dried thoroughly, and stored ventilated, still developed the residue issue known around iO head couplings.

Coolblue 4.4/10 review by B Nabbe (title: "Verschrikkelijke ontwerp helaas"; original Dutch). Said the toothbrush leaks and mold grows inside even when following drying/cleaning instructions; switching brands after always using Oral-B.

Coolblue 4.8/10 review by Jonathan (title: "Niet kopen, snel defect."; original Dutch). Bought three iO 10 units for different properties; two of three failed with moderate use and were repaired under warranty, and one of those was already back for a second repair; third unit only weeks old.

Coolblue review by Jacqueline (title: "Accu gaat snel kapot"; original Dutch, 6.8/10). Third time returning this toothbrush type because the battery dies; called it worthless.