4. Tell us what functions do you think a mod should have
Good variable range for watts, volts, temps - overheat protection, reverse polarity protection, onboard charging. Pretty much what most mods these days have.
Needs to be easy to use - shouldn't need a PhD to get through the menu to change settings. Instruction manual needs to be understandable - too many are published without having the language in them verified. Manuals also need to have print big enough to see/read without having to use a magnifying glass.