Myoelectric pattern recognition (MPR) has shown promising results for controlling prosthetic limbs in clinical practice, but its effectiveness in real-life situations is less clear. In this study, we used MPR to control a prosthetic hand with four different grips. We tested the system on a person with dysmelia in daily activities. The person reported more intuitive control when performing different grips, but also experienced more uncertainty during continuous movements. This suggests that MPR may be useful for certain amputee patients.