there are two main names in DJ cartridges, shure and ortofon. Ortofon use what they call a 'concorde' design where the stylus (needle) is exposed at the end of the cartridge, this makes it really easy to position the stylus where ever you want to drop on the track.
Some people say the S stands for 'scratch', others say it stands for 'sound'- I think you get both qualities with this cartridge. I'm no Qbert but I have scratched with this cart and had no issues- I think this one is built slightly tougher than the nightclub range as I haven't broke a needle yet. Sound quality with real vinyl is great, and I also use it with traktor scratch and it gives a strong signal- no need to get those insane digitracks (and I prefer the blue colour of these)
they feel every inch a premium product (and they should given the price)
but if you look after them you can get a lot of enjoyment out of them and i've only had to replace the stylus twice in a few years of bedroom DJ use