I love the full size grado HF2 and older grado's but these do not sound good to my ears. Strident and uneven. These were not lovingly crafted or dialed in. There was no 'man' behind the tuning of these and this is evident in the final product. I'd love to see grado come out with a smooth yet dynamic sounding iem similar to the HF2 but am not holding my breath, especially when I've found the soundmagic e30 which satisfies my soul in that respect and for much less than a household named company like grado would likely offer such a product for. back to the drawing board for whomever was behind the release of this iem. disclaimer, this is my opinion and worth about 2 cents. Lots of folks may indeed like these if they are not critical listeners and just want an exciting soundscape to distract them from life's hardships.