I used the RCBS ChargeMaster for a couple of years. It worked fairly well, and if operated with care it certainly met or exceeded the manufacturers' performance claims. The limiting factor in this type of unit is the balance. You don't get a good quality balance (such as a force-restoration load-cell) for this kind of money, so the device has the limitations of a strain-gauge balance, i.e. drift, temperature sensitivity, response speed etc. But if the dispense speed and charge accuracy meet your needs it is a good tool.