The only problem with Tasers in my opinion is that Police are more likely to use them unnecessarily than they would a firearm (under the assumption that it's non-lethal). And at the same time that's part of the point of using them in the first place; they are designed to more safely incapacitate someone who is considered dangerous or resisting arrest. If they were only used where a gun was used before, then there's no question that they are safer. If they are being used under an assumption of threat or just because they can, then you get in to a hazy area. They aren't foolproof, though, and that has to be kept in mind if they are ever to be used safely.