I just built my fishing partner a rod on the MB843 blank. He's only used it once and he said the sensitivity was good, but he is also using braid w/ a fluoro leader. As others mentioned above, if sensitivity is key, then go with the HM model. Over the winter I built a rod on a HM-MB843 blank and I really like it. I was concerned about the the power of the rod, due to how light the blank is, but after catching many fish on it the rod has plenty of power.