Bests & Worsts Reviews from Amazon

I wonder whether this product is authentic Manuka honey. I also purchased 2 bottles from New Zealand and realized some differences. 1. The items that I bought from New Zealand have a box with laser seal, while the items from Amazon only come with the bottle. 2. The items from New Zealand tasted a bit sandy, while the ones from Amazon tasted more like normal honey. 3. The items from New Zealand are always 100% full, while the ones from Amazon are only 80%-90% full. Hope Amazon could do some investigation on this product.