Review of Fresh Watermelon Flavor-FLV:

This is a fabulous authentic watermelon. While it doesn't nail quite everything (no heavy watermelon texture) it does authentic watermelon better than any other single flavor. It's fairly sweet, pretty juicy, has a nice body and the finish is great. It also lingers which is something I really like about it. I don't get much in the way of artificial notes other than the fact that it doesn't perfectly mimic a real watermelon (if that makes any sense). All in all, this is the best single flavor authentic watermelon out there. 
I tested it at 1% 1.5% and 2% and never got any off notes and it's authentic vibe never dropped off at all.