I have been through many mounts on my car, but the Damond ones are the only ones I have put on that have stayed. A top notch product. I pulled the RMM recently out of curiosity to see how the bushings were doing...the answer of course was that they are still in pristine condition after probably at least 20k miles of moderate usage. The CP-E Stage 2 mount had already cracked a bushing well before this point. The other mounts are also in pristine condition with no signs of degradation on the mounts at all. The PMM has been on my car for probably close to 40k miles. I have to thank Farhan and Matt for putting out these excellent products. Pretty much the only mounts I have put on my car where I never think about them or worry about them.
Are you DM fully mounted? I have a JBR PMM, and I wasn't sure if I should just go Damond PMM, or go back to stock PMM. It really transmits a lot of vibes/noise, but I'm not sure if only 2 of 3 upgraded mounts would be good at my BNR/ethanol power level.