1) it won’t break down if you maintain it and not use full auto (any gbb wears faster in full auto)
2) this is an opinion but I’ll try and be objective. I have a vector and I have used it with the recoil kit and without. Without the recoil kit it feels like a electric blowback but that is also cool because the vector system manages recoil. After the recoil kit i found it cycled slower (ROF) but had a significant jump in recoil feel. For performance, I prefer it without a recoil kit (stock)
3) I have the vector and other gbbrs, it’s a gem. Only reason I am selling mine is cause I have a project coming up and I am in Sweden (cold)
4) it’s the real Airsoft vector gen 1 gbb. You role up in this on an Airsoft field is like rolling up in a Ford Shelby Cobra. It’s accurate, it’s fun to use and is awesome in cqb. 2 shot burst is awesome as well and pretty handy. Are there better options out there? Yes. Its an acquired taste. Oh and parts are hard to come by.
hope that clears it up.