I'm not usually a fan of custards. They all have that "candle wax" vibe to them. Vapetasia's Killer Kustard still has a tiny bit of that waxy thing going on (it is a custard vape after all) but nowhere near the other ones. The aftertaste you get from KK is very nice. It's slightly sweet and has a nice vanilla flavor.
This juice has a very interesting inhale/exhale. When you first inhale it you might think "wow this is sweet" but when you exhale a lot of the sweetness disappears and you get a nice creamy vanilla with a thick mouthfeel. Usually it's the other way around with juices, the inhale can be sweet but the real sweetness comes out in the exhale.
If you're wondering just how sweet this juice is, I would say about the same as Dinner Lady's lemon tart. It's not very sweet but not completely devoid of sweeteners. From a 1 to 10 on the sweetness scale with 10 being the sweetest I'd give it a 6.
Regarding the custard flavor, it's the best one I've tried yet. And the least offensive. Beard #51 was way too waxy for me and lacked sweetness. Killer Kustard is a much lighter flavor and much more pleasant than #51. I enjoyed Yami Taruto but it had a sort of latex glove aftertaste to it that took a while getting used too. Taruto is also "eggier". Killer Kustard is much smoother than Taruto and creamier as well. Between the three of these custard vapes, Taruto is the sweetest, Killer Kustard somewhere in the middle and #51 was severely lacking sweetness (weird for Beard Vape co).
The reason I'm giving this a 4.5 instead of a 5 is for two reasons. First, it's not sweet enough for my taste and I think it would be the perfect custard vape if it was slightly sweeter. Second, the creamy/vanilla aftertaste could be a little stronger. If it was it would be a 5/5.
All in all his juice is the definition of an ADV. It's not too sweet, not too flavorful, but it does satisfy in both regards and it's got a nice, rich mouthfeel. It's one of those juices you can vape all day long and not get burned out on. If you love super sweet juices like me, this Killer Kustard is nice to have around for those moments where you need a break from all of that sweetener.
I honestly did not expect to like this juice but I was pleasantly surprised and it will become a regular in my rotation from now on. Great stuff.