**Sour Gummy (LB) 9% (3-21-21)** -- I'm always aprehensive about testing additives" because you never know if you're going to blow you face off on a tankful of sour hehe. Thankfully, no one died during THIS test of Liquid Barn's Sour Gummy. When I saw that LB recommended 17%, I thought that seemed pretty damned high, and I backed it down to 9% which was fine. This one presented as a trivecta of Sour/Sweet/Gummy, with all three being equal, and without one stealing the show. I had expected it to be far more SOUR due to it's billing, but again, felt like three notes all combined. The Gummy was actually fairly accurate and convincing, the sweetness was a little above mid level, and the sour felt almost below mid level. If you're needing something REALLY sour, this may not cut it for you. Having never solo'd it until now, I mixed up a 70/30 mix of this and Liquid Barn's Green Apple for a co-worker, and he loved it, so additives DO have their place in this world. As a solo vape, not the exciting-ist vape, BUT, does it do what it claims ?? Yes, BUT, with a somewhat reduced sour, which with no aftertaste, off-notes, would really be the only take-off here. Works pretty good, but keep in mind, it's not going to top off your sour tank if it's on empty. Nicely done as an additive, and felt great at **7.8/10**."