I have found that e-cigs are such a personal preference thing. In my experience I didn't care for my pen style because it had a hard draw and it seemed that the atomizer would produce less and less vapor as I used it. BUT, I loved mixing all my own juice flavors and the ease of refilling. Because of this I am trying to decide if I want to try a DSE-901 or a 501. I would like to have one like this on hand for when I am bored at home and want to do some great juice mixing experiments.
On the vapor king I just love the vapor production, this thing is amazing! Refilling isn't hard but I am always wondering how long my disposable atomizer is going to hold out. Can I refill it one more time? Will more cartridges be stocked before mine all die? Thats the big fear. It is not as easy to be creative with the juice. If you mix up a flavor you hate it is not so simple to pull the fluff out, rinse and replace with a fresh flavor.
Now, the VK would be perfect for my father. He is the type that would not want to mess with it. Put on a new cartridge and go. He would have given up with the pen style and hated vaping.
So, I think you have to weigh out what you want. Then purchase the product that is best for you. Personally I want it all, so I will end up spending some money until I feel like all my needs are met through one device or several.
Bug