For me…. stingers work really well… to give me a HEADACHE because to me they are messy and a pain in the posterior to clean, and they impede my using a pipe cleaner. As far as improving the actual smoking experience…. no difference identifiable for me.
My favorite way to use a stinger is to gently remove it from the pipe, clean it, usually with alcohol running through the stinger and often running through me as well, placing them into an old cigar box I keep all sorts of do-dads, and then storing that cigar box in a desk drawer. With this form of stinger usage, I have also found the benefit of saving and using less aspirin as well… a double benefit.