Welp, yes and no. I love those for O&A (great lil back ups) but I would recommend a Provari. For me (for now) I really want to feel more secure in the longevity of the things I buy. My experience with the cheaper Chinese devices is that they really will have a much shorter life span.
So, I say, enjoy them! Enjoy them as long as they last! For my map of future vaping, no matter what happens, (and I think we all feel pretty united on what we think is going to soon happen) I want my tried and true, my dependable and never failing Provis.
Now that they are well under $100., I have no qualms recommending them in here.
No bells and whistles (mine are VV and no TC, of course), but just good and solid and reliable vape perfection.