I have the Jac Vapour Series B and two Dicodes (Dani Extreme v2+ and a Dani Box) in addition to many ProVaris of various models as well as other box type
mods made offshore. As much as I like the Jac Vapour Series B, for myself I am finding the quality not quite up with the ProVaris. If they make some improvements, I would consider buying another one as I do like the form factor as well as the
dna chip. I will say the customer service from Jac Vapour is top notch and they are very responsive. They had to replace my Series B for me and did so at no charge under their six month warranty. The Dicodes quality is right up there with the ProVaris as I would expect it to be.
Just my personal experience and YMMV.