Yes, there have been reports about poor quality on those MikesXS repro advance units. Although they're cheaper than a new original, they're not that cheap where you want to be buying one every 9 months, lol. I would suggest switching to the E-advance, which eliminates the advance unit completely, or finding a nice used original. With more and more people switching to the E-advance, someone would probably sell you their old original for a good price.