The diffuser is so much more superior than the Chinese made that don't rate a mention in my book. Actual fact the Chinese made is absolute rubbish compared to this one.
The Chinese made diffuser took 5-6 hrs to ozonate 200ml bottle of extra virgin oil and this fine pore kynar one took less than 1 hour
The water with the China made diffuser takes 45-60 min. to ozonate 750ml and using this one took 15 minutes.
I highly recommend this kiwi company over the rest and will purchase other products they make - very professional and proud company.
Haven’t used it yet - so I don’t have a rating-
It's great. Connection firmly attached, working well.