I have the MVP4, it is a good reliable mod. The 510 connector is of good quality, it is spring loaded.
Mod has a 4500 mah battery which last all day or good part of it, depending on your vape power.
The MVP4 can deliver 100 W max, but from my experience I wouldn't use it above 75 W. It is a 3.7 V step-up circuit, and it's efficiency decrease dramatically above 75 W, leading to short battery life if you use it close to its max power. On the other side of things, with a Triton mini at 9 Watt, battery is still half charge after a day chain-vaping.
The only "con" is the fire button, it is a bit mushy, nothing like the power button of the legendary MVP2.
Use a good 2 Amp branded charger with the MVP4. Cheap dollar-store USB chargers can damage it. The mod has a 5 V 1 A output to charge a smartphone. It will fully charge an IPhone 6 in 3-4 hours, but the mod battery will be completely depleted afterward.
I tested TC with SS only, with a Serpent mini 0.5 Ohm SS coil, and works well - but the 510 has to be perfectly clean and dry.
Hope I told you what you need...