@vapervince is right about how cheap the Pulse v3 feels because of it's plastic casing. However, I vape on it every day because aside from the casing it is actually a really well designed little mod. The doors just pull off from magnets so you can easily change the battery and fill the squonk bottle in seconds without ever needing to remove the atty. The only time I ever need to do that is when it's time to put in a new build. With other squonk mods you have to unscrew or open the battery compartment from underneath every time the battery needs changing which you can't do as easily without turning the whole thing upside down which will cause a total mess unless you remove the atty first.
As I only use wattage mode I don't need all the features of a top DNA chipset but all the normal funtions are there if you want to use them.
It's very light and compact and feels nice in the hand so although the case might feel very cheap and crappy it is actually a superb little squonker.
I don't do mech mods so I wouldn't go near the v1 but the v2 and v3 are both fine but the fill port on the v3 makes refilling so much faster.