I have used this HF large tumbler for over a year and it continues to do a fine job, is relatively quiet and vibration is less than my Lyman 2500. I usually tumble ~ 1200+ .45 auto cases for 2 hours or so using a 50/50 mixture of walnut and cob and the outside of the cases are spotless. Have only tumbled about 22k - 25k so far of .40 S&W, .357 mag., .45 auto and .44 mag, but all is well. My original intent was to use this large unit for large batches and the Lyman (and the FA which burned out) for smaller ones. But I now use the HF for most everything...