I have tried El Kamino, Deadly Sin, 9 2 5, Butterscotch Yo (favorite line form the movie "Kids"), Blue Swag, Magic Fairy, Black Fairy, and Melon Boba.
El Kamino somehow keeps ending up in my mail box. I wasn't particularly a fan of it at first, but I'll be kitten'd if it hasn't grown on me. Tastes like a black and mild cigar. I do not get the chocolate hints other folks describe, though there is a sweetness to it. I said this in my review on the site and still hold to it. Someone described it as "skeezy" and I think that is VERY fitting.
Deadly Sin isn't bad. Not something I can vape on all the time. I ordered a 30ml bottle some months ago and still have about a 1/4 of it left. To me, it smacks of rice krispy treats, and tobacco.
9 2 5 is the first coffee vape I have tried. Tastes just like black coffee that you get at a diner, that maybe isn't so fresh. I have added cream and sweetener from my DIY stash to this juice, and can deal with it when I wake. After that, not so much. Then again I am not a coffee drinker.
Butterscotch Yo I ordered this one because of the movie Kids. When Telly leaves the house of his first score of the day, and offers Casper to smell his fingers, the reply is "Butterscotch Yo." Anyways, you can tell what this tastes like. If you dig the flavor from other venders then you will most likely dig this one.
Blue swag is a tobacco blueberry. The throat hit on this one is a bit too much for my preference. The flavor is ok, but for some reason I just don't think the 2 should be mixed. Its not bad, by any stretch, but its still sitting on my desk in an almost full bottle.
Magic fairy and Black fairy. I PIFd these to a fellow vapor. I hate licorice and should have known better when I ordered them. To me, Magic tastes just like Nyquil. I never bothered opening Black fairy. I ordered some Pluid like an idiot, and should have that in a few days. I got a feeling I am going to be trying to trade it here in the next week or 2.
Melon Boba is pretty doggon yummy. My only gripe, is the sweetness. I just can't vape it for too long. The "kiss" of mint inside this one, really makes it stand out. I vaped my entire first bottle, and reordered it. If you like watermelon candy, you can't go wrong here.
I suck at reviewing flavors, and of course it is all opinion, subjective etcetc. I said it on their site and will repeat here again. If you are curious of any of their juices, why not try em. The prices are just right, you won't break your bank. I have read you can ask for different vg/pg levels in the comments, and I did so on my last El Kamino order. I don't think it was honored however. Still looks as thin as it did as a 50/50 and i asked for max vg.
BTW - I let all my juices steep, but I tend to vape em as they go. I have not had an issue with any of the above bottles tasting chemically, or dirt, as previously described. They DO get better with age. I think that holds true for every juice.
Also, you have helped me, now I can say few more things. 
No coffee aroma what so ever, it is 100% pure cocoa aroma. It could be cultural difference, in Serbia beside filtered and all espresso coffee variations, cooked/boiled and unfiltered black coffee is most popular. 
