Wizard Puff adverts themselves a lot and I have suspicion of them posing as "somewhat shills". Though maybe some people just conveniently already had purchased their devices from them around their online stores launch time and felt others should be informed that there is a seller not in China for this vape. (It happens, I am only seeing one side.)
But I feel despite them wanting people to know their online store just launched and that they have products that "work" they are a good vendor or intend to be. I understand these devices they sell come from China and they (WP) are more local for some of us. Their goal is to make it more convenient for you to get it. From their interactions with my videos and spam that somehow got in to my Gmail I feel they should be very responsive and interested in your business.
I personally would choose a different source especially knowing I can get it for less without seeing a unrealistic "was" price or having to be enticed by a coupon to consider their vapes.
That is just my perspective of Wizard Puff which could be totally skewed but shouldn't be thought of as negative criticism towards them. I do think they are just another online store trying to exist probably with not too many bad intentions besides a little profit. Its not like everyone else isn't doing what they are..
That would be the feedback I have, take note I haven't bought from them.
EDIT:
TLDR I have an opinion, to sum it up, I think they're legit.