You can check the archives of this forum and on Vinyl Engine and Vinyl Asylum. If you search on "Koetsu", I do not think you will find evidence to support the contention of the person with whom you spoke. Yes, some people love Koetsu and some don't, but I have not seen comments that collectively indicate an endemic problem with fragility.
Personally, I have always disliked Clearaudio cartridges. They tend to have a sterile or "clinical" sound that I find fatiguing. My opinion is based on listening to some of their most expensive models on very high end turntables, but it's entirely possible that their less expensive cartridges actually sound better.
Personally, I have always disliked Clearaudio cartridges. They tend to have a sterile or "clinical" sound that I find fatiguing. My opinion is based on listening to some of their most expensive models on very high end turntables, but it's entirely possible that their less expensive cartridges actually sound better.