The attenuation on these is absolutely fantastic. I'm coming from a pair of Flare Isolates, which are a different pair of highly recommended earplugs in the same price range as these. I'm confident in saying that the C&P Earplugs are much better at maintaining a natural sounding EQ than the Isolates. Conversing in loud environments is easy. Maintaining situational awareness such as when I'm skating with these on is easy.
I have the 9dB and the 25dB ones (not the ones for firing ranges). The 9dB are good if I'm in a car and want to keep up conversation with friends, though I will almost always revert to the 25dB ones for louder situations such as near busy roads or at jam sessions/concerts. I will say this - Don't bother with the 9dB ones if you want to protect your hearing whilst performing. The EQ sound exactly the same on both of these, and hearing quiet sounds is not difficult at all with the 25dB ones, so really just go with what you feel will protect your ears the best.
I am going to purchase another pair, this time the 27dB, as at my favourite clubs which play music at extreme volumes, I still feel that the music is too loud with the 25dB earplugs on, so maybe that extra 2dB might help...? I think it's worth a try.
One thing I will mention when comparing to the Isolates is this: Whilst the C&P plugs have MUCH more natural EQ with mids and highs, you don't feel sub-bass in your body with them on like you do with the Isolates. This has led me to preferring my Isolates at clubs for the time being.
Also, I'm subtracting a star from this review, because the C&P Plugs are difficult to get in just right. I find that they slowly slip out of my ears and I have to push them back in after a few minutes of dancing. Also, you can sometimes insert them in such a way that the silicone will sort of twist/fold about in your ears slightly, and since they are in your ears, this will cause an annoying sound and will force you to re-adjust them as you're wearing them.
Still these are an amazing set of earplugs suited for almost all situations. Absolutely do not shy away from them, especially at a price like this. Your hearing is very important, and you'll thank yourself when you can still hear perfectly after a night of blasting music :)