I purchase the jam box 3.7 box mod during their Memorial Day sale, this thing is awesome! Clouds of vapor great flavor. I'm using a stormy tube mod, this performs much better than my ego 1000ma battery! Their customer service is excellent, very fast shipping. I ordered it on Tuesday after Memorial Day and it was in my mail box on Thursday. I had a problem placing the order on my computer I called them and they walked me through it even entered in for me. I send them an email about some concerns that I had yesterday, I got an answer early this morning, they said if I had any problems they would make it right, this is great customer service. I will definitely order from them again!!! Thanks again KVS!