Yes and yes. I've used pepper spray NUMEROUS times with differing results. It is definately NOT something I would bet my life on (or my loved ones). There are so many factors which can all affect how it effects a person. Weather conditions, the targets mental state, prior exposure (most ex-military guys I've met are immune it seems), how well the stream is applied, duration and it could go on.
I've sprayed folks and had them freak out and run screaming, I've had them just look at me and stand their ground, some it works on, and some it just plain made mad and we resorted to the old fashioned manner of handling such incidents
, Now her primary concern is simply getting away so simply blinding a subject may have the desired effects but, like firearms, nothing is %100 effective so it pays to have an alternative.
Also, everytime I have ever been around a pepper spray incident, I always get hit either directly, or with overspray or through transfer contact when we end up having to go hands-on, and while it has varying effects on the bad guys, the stuff ALWAYS works on me. LOL. So, she had better be prepared for the effects herself (which means exposing her to it) so she doesn't freak out when her eyes clamp shut and she can't breath.
I'm not saying that it's worthless and if thats all she'll carry, then thats all she'll carry. It is better then nothing (marginally) and much better then giving her a firearm she does not want or know how to use. Although she needs to understand it's limitations and not think it's a cure all and not be surprised when the big 300 pound biker (or the little 100 pound woman...those are the worst) snorts it up and keeps coming.
Tasers are great...when they work. I've seen them not work for a variety of reasons. The BG's are now practicing ways to defeat Tasers. They know they're out there and are prepared. They are great for LEO's when there are (usually) more then one of us so if one Taser doesnt get him or doesnt work, #2 is on the way. We also have other options (up to deadly force) if the thing fails to work. Like they teach us, it's simply another tool and you have to know it's limitations.
Like the pepper spray, it's better than nothing and probably ranks higher up the effectiveness scale then the spray except if she misses with one of the two probes, it's game over. yes the taser does have a "stun gun" type feature but that does not cause the complete muscle failure and associated collapse that the probes do...it just HURTS and sometimes that pisses people off. With pepper spray, at least you have multiple shots so it's a trade off (both would be a better option)
But, whatever option she chooses, as others on this forum can attest to, without the conscious ability to use the tools at hand, and the mental preperation to inflict harm on another human if the need arises, all of the equipment in the world is for naught.
Best wishes and hope for a safe new year.