I have 1 to start and 3 to finish. I may have to consider getting 2.
Personally I wouldn’t waste my time. I had to employ one once and it was majorly ineffective....that is until I used it as a garrote. If you look at the u-toob vids of the Milo Berkeley riot you can see people - girls - being beaten with staffs. You can tell they’re gonna be bruised but they’re not being incapacitated. That’s about how effective they are.
Also, in my opinion, the more times you are exposed to it the less effective it is against you (having been exposed to CS and OC multiple times myself)......all it does is piss me off.
If it is time to defend yourself, it is time to defend yourself. Coming to terms with dropping another human being can be hard for some people.
However, it is something all should come to terms with (in regards to self/family defense) and mentally prepare for.