I started renting the electronic scale from the big pump company in August. I still haven't become completely comfortable with the routine, but have been very pleased with the improvement in precision of my assessments. Even if I don't do ac/pc weights, having such an exact nude weight is wonderful. There are a number of negatives, but stress to the moms has not been one of them. As a matter of fact, I have observed the reverse. Our reluctance to use this technique may be tied to how this was used in the bad old days by hospital nurseries which then didn't have accurate enough scales to be doing what they were doing. Add to that the negative way that this information was presented to the moms (probably many of us). The negatives are the expense, the bulk ("my black bag" is now three large and heavy bags, along with a large purse, I put all four over my two shoulders and knock down anything in my path), and the increased time and complexity of the consult. The positives are the response from the physicians receiving the reports and the parents comfort with having a little more data on what is happening. I delayed trying the pump for more than a year because of my prejudice against ac/pc weights. I think that I was wrong and I intend to continue using the scale. (ac/pc means before feed and after feed) Ruth of Verona WI