Well, if you are stuck in an APT complex, or an H.O.L., it maybe one of the few GND counter poise options out there. Most of the time, the electrical GND sucks by just bringing in more noise, plumbing GND maybe an option, but that may either have power panels GND'ing to it, or might not be all copper, but PVC. So, that MFJ Artificial GND can indeed be useful and make a noticeable difference. I have found that I would need to retune that when switching from one band to another.