. 
Keep it. Yes, it is not a mechanical, but hey, good for testing your atomizer resistance. Seriously, a Provari is a hell of a nice thing and is stonkingly good if you have a nice topper. My Provari and my Zen Genesis will always be in my rotation.
i'm sorry, but i'm just not a fan of any of those things... maybe i haven't been vaping for long enough or something, but i just don't know about those or why they might be much or any better than anything i already use. i'm still content with my ego-style+ stuff atm...
the point is: convince me if you can