What? The Provari by itself is $160. The kit with 2 18490 batteries, charger, 5 pack of 3 ohm cartos, and metal drip tip is $212.
I agree with AZCraig about how nice it is to be able to check the atomizer resistance. Your carto or atty won't always be exactly the resistance that it's advertised, there is (admittedly, seemingly small) variation. They also won't always stay at the resistance they start at either from what I've read, so there is value in being able to check those things with your device to get your perfect settings dialed in for whatever juice you're using. The battery check is pretty handy too, I like being able to tell if my battery will be good when I'm going out, or if I'll need to grab a spare.
With the Provari you also have a bit more flexibility with size and batteries. The mini can take 18350s and 18490s, the full size can take 18490s and 18650s. They function exactly the same, but it's nice to have the choice since everyone's needs are different. I realize I seem to be talking up the Provari a lot, but I just thought I'd point out a couple plusses I hadn't seen mentioned (also I'm just *really* happy with mine). I can't speak from experience about the buzz pro, but it certainly seems like a great mod and I don't think you can go wrong with either. Just depends on which you think will fit your needs the best.