This has been my go to supplier for over 2 years now. The shipping time is great and most of the time the product is great. The potentcy will vary from batch to batch and order to order, but most of the time the potentcy is what should be expected. I have received 2 orders where the batch was not as potent as the previous batches, but what can you expect. Overall, I will not change to a different supplier and will continue to use Flavourz as long as they are around. I would like a little more consistency in the quality of the product. If Flavourz has recently changed their own supplier, I would highly suggest they return to the previous supplier as it was much better.