To evaluate the Sonic 100, our Consumer Test review team used the toothbrush daily over a 30-day period. Each reviewer replaced their usual brush with the Sonic 100 and logged their experiences. This allowed us to see how the product performed in realistic, everyday use rather than in a controlled lab setting.

We tested the five brushing modes across different needs: sensitive mode for irritated gums, deep clean after heavy meals, and polishing mode for users who drink coffee or tea. Battery life was measured by timing how many sessions a full charge could last, while the quick-charge function was tested by checking if a short 5-minute charge could reliably power one or two brushing sessions.

Finally, we checked the waterproof design by using the toothbrush in the shower and rinsing it under running water without issues. Testers also gave feedback on comfort, grip, and noise level. All results were collected, compared, and averaged, giving us a fair overall picture of how the Sonic 100 performs in daily life.

We tested the Oral-B iO Series 6 for 30 days, with several people swapping it in for their normal brush twice a day. The five brushing modes were genuinely useful—sensitive and super-sensitive settings helped those with gum irritation, and whitening mode made a difference for coffee and tea drinkers. The pressure sensor stood out too, flashing green when brushing correctly and red if pressing too hard. A couple of testers who usually brush too aggressively noticed real improvements in comfort and gum health, although a few said the handle felt a bit slippery when wet.

The battery lasted about 7–8 days per charge, which is fine but definitely shorter than some other brushes in the same price range. On the plus side, the LED screen clearly shows battery percentage, modes, and brushing time, giving it a nice premium feel. Cleaning performance impressed most people—it’s quieter and smoother than older Oral-B models like the Genius X, and it leaves teeth feeling polished with less effort.

We also looked at the extras: the travel case, head holder, and AI-powered app. The case was handy for short trips, but the app didn’t win many fans—it often struggled to track brushing areas properly and came across as more of a gimmick. The bigger downside most testers mentioned was cost. Replacement brush heads are expensive, and it only ships with a 2-pin charger, so UK users will need to buy an adapter separately.

All in all, the iO6 is a high-performing toothbrush that improves on pressure control, noise, and overall cleaning. But whether it’s worth it depends on your priorities—if you’re after smooth cleaning and premium features, it delivers good value for the money. If long battery life, reliable extras, or lower running costs matter more to you, you may find it less appealing.

We tested the Philips Sonicare DiamondClean 9000 for a month, swapping it into our daily routines. On the positive side, the four cleaning modes and three intensity levels gave plenty of flexibility: whitening mode showed gradual improvements for coffee and tea drinkers, while deep clean+ left teeth feeling noticeably smoother after regular use. The built-in pressure sensor was a nice safeguard too, especially for anyone with sensitive gums who tends to press too hard.

But when it came to drawbacks, they stood out more than we expected for such a premium model. The battery performance was inconsistent—some of us managed over a week on one charge, while others had to top up more often, especially on higher settings. The travel case was handy but the magnet closure felt flimsy and even popped open in luggage a couple of times. Only one brush head comes in the box, which feels stingy considering the high price tag, and buying replacements isn’t cheap. More concerning, we noticed that some testers—and many customer reviews—reported charging faults or breakdowns after just months of use, which raises questions about long-term reliability.

Design-wise, the DiamondClean 9000 does look and feel premium, with a slim, quiet handle that’s more refined than older Sonicare models. Still, the high cost, limited accessories, and mixed durability keep it from being an easy recommendation. Overall, it delivers impressive cleaning power and a very personalized brushing experience, but whether it’s worth the money depends on your priorities—if you value performance and features above all else, it’s a strong choice, but if reliability and cost are bigger concerns, you might feel let down.