It seems there is some problemsssss ....
Do you recommend buying Vector 3 or not?
What do you expect?
If you spend 10 min reading in this forum you will find 90% owners having a severe problem caused by the weak design of the battery compartment.
Same if you consult other www resources.
Considering the situation that mostly unhappy user post in these resources and the majority of happy user do not post at all, I would say you have a 50/50 chance to get along without trouble.
On my side, I am a happy Vector 3 user so far.