This is a guest post written by Morandir835, a regular on V4L's sub forum on ECF, and an e-cig enthusiast. If you go the juice route and decide to fill carts yourself, there is one thing you're going to notice. There is a slight variation to each batch produced. Think of juice-making in terms of producing craft brew. Each batch uses the same ingredients, but that doesn't guarantee they're all going to taste the same. Some people like this aspect, while others hate it. For me, this discrepancy adds to my vaping experience. New Menthol WOW  is one of my favorite juices, and to say I vape it a lot is an understatement. I've tried five different batches of this flavor. Each one has highs and lows (though I will say the latest batch 17102011 has no lows). Learning this will no doubt lead to a certain degree of appreciation for the really great batches. New Menthol isn't the only juice where I've seen this phenomenon. It can also be said for Wowboy, Smilin's Special Menthol Premium, and Wowboy Peppermint just to name a few. It's all part of the manufacturing process. The final juice taste can be affected by a little too much of this ingredient, too little or too much heat, or other minor variations. Similar to craft brewing, the slightest element off will change the whole flavor profile. The downfall to this variation is sometimes you will get a batch that doesn't stack up to others. I can honestly say I've never had a bad batch of any of my  €˜go to flavors.' On a letter-grade scale you'll find the occasional batch that just gets by with a passing grade of C instead of an A or B. To their credit, V4L does their best to catch a failing batch before releasing it. My suggestion is if you find a truly great batch, order as much of it as you can. You can always request a certain batch number in the comments section of your order, and as long as they have it in stock, V4L will send it. This is much harder with the more popular juices, because usually they only have the most current batch in stock. Just something to keep in mind. Contact Morandir835 via e-mail at [email protected] or through his page on ECF at "Even Though I Nothing Learned, With Strength I Burned." - Emperor