I've been making my own juices now for about a month, and it's a whole school of process, trail and error, failure and success, note taking, and research. I have some flavors that were purchased at one of those health nut oriented expensive grocery stores, and some flavors that I purchased at a Wal-Mart. The flavors I found at Wal-Mart are 'Watkins' brand, and are PG based for the most part, and I have to admit, they work. I would say that the cherry and strawberry flavors are super strong, even stronger than the LorAnnOils' 'Highly Concentrated' varieties. My favorite flavors so far make use of them. The one's I got at Whole Foods are made by 'Frontier', and are 'Sunflower Oil' based. I am pretty sure that the sunflower oil, when vaped, brings a taste of it's own that is so disgustingly overpowering that it erases the taste of any other flavor present. My bottom line observation is to avoid any flavoring that contains sunflower oil. I am afraid to try any of these flavors at all anymore, because it seems likely to be a waste of money. I thought that I would post it here, to hope for feedback from someone who either knows for a fact, or could let me know that they too had the same experience that I had. If so, please post a reply to this thread. Thank you, and sorry if this topic has been touched on, I searched, but could not find anything specific regarding it.