Hey @lewm - van den Hul cartridges use a unique designed.shaped stylus, and of course like all MC carts, they need to be professionally serviced, unlike the pop on MM type stylus combo pieces.
The way VDH styli fit in the record's groove (as per VDH's web site) gives them their long life as I mentioned and @ghdprentice experienced. I don't see why anyone who uses a turntable a lot would buy anything else if they are considering a MC cartridge, unless cost is not a major concern. I know some like to use multiple carts, arms, etc. I mainly am interested in the music and not swapping gear out very often. I prefer to spend $$ on records and have about equal invested in hardware vs. software.