Here is my summation of the Big 3 TC chipsets:
If you're a tinkerer and like to control every little aspect of your vape. If you're proficient with a pc. If you like many different form factors then get a DNA.
If you you like adjusting things on your mod or via an app? Right now the app is only available for iPhones. Then get the new Yihi board.
If you want to adjust everything on your mod. If you want to tc anything (including Kanthal)or fire anything then get an FSK board.
In the end we can all speculate which board is the best. The bottom line is the best board is the one that keeps you off cigarettes and works for your personal wants and needs. I say try everything and don't pigeonhole yourself to a specific board. New stuff is always coming out.
Up and coming or under rated TC chipsets:
The VO board is available in the CKS Icon and a few other mods. It does a wonderful job in tc but it's an auto tc meaning you can not pick your wattage the mod does that for you. Normally for me that would be a con but this board is really accurate and honestly I don't mind not being able to choose my wattage on this mod.
The Innokin Aetheon board in my opinion is one of the most under rated TC boards on the market today. It does a more than respectable job with TC.
Variety's the very spice of life, that gives it all it's flavour.
-William Cowper