Great resource sticky here, BoneDocPaul
http://www.audiocircle.com/index.php?topic=31869.20I put it about mid-pack in this group.....tied for #5 with a couple others.
Broken in is usually 25+ hours for a cartridge...some a bit more, some less, but about that I've found. My London has 'round about 50 hours on it (if the original owner was estimating right at 25 hours he put on it)
Unless there is something wrong with this cartridge, it just doesn't measure up for me

John