I have the iStick, one of the new Innokin MVP20W, and a Cana/Hana 30 box mod clone. I love all three of them.
The iStick is the smallest and stealthiest. Yes, it has issues with overpowering, but you can adjust for that. The non-adjustable 510 pin is problematic, but iLeaf recently released the iStick Mod Bending Adapter to address that issue, as well as the reported issue that the 510 threads are soft and prone to stripping. My only other complaint is that it won't fire anything under 1.0 ohms. I am not a sub-ohm user, by any means, but occasionally I miscalculate and have a build come in at .9 ohms and it won't fire which can be frustrating. At 2000mah I can easily get a solid day of moderately heavy use out of it, maybe even as much as a day and a half.
I was surprised with the size and heft of the MVP 20, which is not necessarily a bad thing. I thought it would be about the same size as the iStick, but in reality, it's nearly the same height (it's actually a wee bit taller) as my 30w HANA clone box mod, but a little narrower.
It has a springloaded 510 center pin, and I have yet to have any issues with any of my attys making a solid connection. It's a solid device. My only issue with it (this is my first Innokin device) is the menu system - simple once you learn it but IMHO it's not as intuitive as the iStick or the DNA 30. Also, the watt adjustment adjusts only UP in .5 w increments which doesn't allow for fine tuning the wattage in .1 increments which seems to be standard on most other regulated devices. Maybe the .5 w increment adjustment isn't that big of a deal, but I do not like the fact that adjust the VW or VV can only be adjusted UP - wish it were up and down. The VV settings are adjustable in .1 v increments. It can also serve as a power bank that will charge any USB device that you connect to it. I used it to charge my iPad mini that was at 6%. After about an hour of charge time while Vaping on it at the same time, the MVP battery (which was fully charged when I started charging the iPad) died and my iPad mini was sitting at 16%. Definitely not for getting your device to a full charge, but would work in a pinch for a quick call or two, a few emails, and a few IMs. Don't buy this for that feature alone thinking that you'll get an attached USB device to a full charge - it isn't going to happen. Not really a negative, but something to be aware of. Same situation here with the 1.0 ohm minimum load. Annoying if you miscalculate and your build comes in at 0.09 Ohms. The 2600mah Lithium Ion battery is capable of giving me nearly two full days worth of moderately heavy use.
I won't go into the details on the DNA 30 clone - it is what it is. I love mine. I only brought it up to use as a reference for size comparison. I am very happy with all three of these units, and really don't prefer one in particular over the others. I think you would be pleased with any of these devices. I am curious to see a Cloupor T30 mini in person - might have to get one of them.
All three devices pictured have a Nautilus 5ml tank attached.
ks
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