I have a few x2s from smokeless image (which I love) and am curious about stepping up to variable vaping. The itaste MVP seems to be reasonable priced. I want to be sure I buy something that I will enjoy and that holds my interest for a while. Not something real complicated or expensive, but something that will improve my vape experience. If anyone knows the pros and cons of this device, I would love to hear from you. If anyone has any better ideas, I would like to hear those too!!! Also, I would like to know if the batteries in the itaste MVP are replaceable, or if the whole device has to be tossed once the batteries die??? Thanks