Amazon calculates a product’s star ratings using a machine learned model instead of a raw data average. The machine learned model takes into account factors including: the age of a review, helpfulness votes by customers and whether the reviews are from verified purchases.
This is an excellent product of used correctly. Ensure you use hot water as the mug draws on this heat to maintain temperature. The issue I have is with the pricing. This item is $US85 on Amazon.com, but over $AU300 on Amazon.com.au. Really? I've seen Australia tax applied before, but this is ridiculous. Hey it overseas if you can. Incidentally I paid $AU150 for mine earlier this year and it's more than doubled in price on the site
You’ve got to remember to switch it on for it to work. LOL. switching on a mug takes getting used to. Brilliant product. Packaged well. Prompt Delivery. App is intuitive and easy to navigate. Battery life is the only unknown as it seems to be a sealed unit. Check back in 6 months.