I have been using Na'vi products for about a year now, and I really appreciate the high quality of what they do. I know from experience with lesser quality versions that Na'vi quality is very good. Their service is also good, products arrive well packed and in good time. Everything is responsibly packaged too - almost no plastics, just the lids of the jars. Over time I can track that regular use of the products has improved wellbeing, some herbs like the nootropics are quickly noticeable, others like the tonics seem to build strength over time. With herbal medicines it really pays to get the best quality otherwise its touch and go whether they work...Na'vi certainly deliver in this regard and I am thankful for what they do.