As advertised, it tamps consistently. Each tamping process is quicker and easier than manual tamping. I like the fact the process requires only one hand, as opposed to two in manual.
The only drawback is that the tamper surface gets dirty with the grind very quickly (because it does not 'twist" as in manual). After 3 or 4 tamps we have to clean it with a rug or a brush, leaving the coffee grind around the device.
Overall, we are happy with the purchase, and my overworked wrist with a tendonitis thanks a lot. I know it is an expensive investment, but loss of my hand will cost a lot more.