I started sounding with one of the stainless rod sets, and while still enjoyable the curve of the rods didn't quite play perfectly with my anatomy, so I decided to try these more flexible silicone sounds. OMG, what a sensation! Inserting them all the way is WAY easier and hits exactly the right spot, and the direct prostate stimulation feels like a really slow, decadent orgasm that you have absolute control over. I still like my steel toys, but these are now my go-to sounds. Bought the advanced set too!