I have researched all week and I think I want to get the Innokin MVP 2.0 but watching the reviews and not many threads on here yet about it. I know it's pretty similar to the MVP 1.0 (minus ohm meter, VW, and other aesthetic things). My main concern is how stiff is that firing button on the 2.0. I know PBasardo did a a review and says that its about 2 lbs of pressure. But, is that really that much? In my head I'm thinking no but that's because I'm using mech mods where the bottom button needs to be pressed pretty firmly.
I have an MVP 2.0 and don't notice any difficulty using the fire button. It definitely requires a bit more pressure than my iTaste VV 3.0, but I can leave the MVP 2.0 powered on in my pocket without worry of it self-firing. With the VV 3.0 and its lighter button, I have to turn it off when it goes in my pocket or else I'll waste battery and get a warm leg.
To put things in perspective, a typical handgun has about an 8-10 pound trigger, and it is (obviously) actuated by your index finger. This is a fairly large amount of pressure (compare it to lifting a gallon of water, which weights about 8 pounds, with just your index finger), but it is a safety measure to help avoid negligent discharges.
Target pistols for competitive shooting may have a 2 pound trigger, and that is
extremely light and easy to pull. Your thumb is stronger than your index finger, but the opposite motion of pulling a trigger versus pressing a button basically cancels that out.
My point is that unless you have severe arthritis, a 2-pound fire button should not be any problem whatsoever. You of course may prefer a slightly lighter press, but it's not like you are going to get tired or cramped up with a 2-pound button.