i have a Ds-s1000, had it for nearly 3 years and its belter, for a cheap CDJ it a beast, i know gloxxt uses them n all, the only thing is i am unfamiliar with CDJ's so when i play out i am a bit stumped, but for the cash, good buy mate.
As the scouse manc has said, I can not fault them for the price. They perform excellently. The problem with them is the pitch increments are +-0.1% where as something like a Pioneer CDJ-400 has pitch increments of +-0.05% so are more precise.
Yeah as people said the 0.1 +- and overall pitch aint amazing but I delt with cd decks for two years using these increments and just takes a bit more extra work, effects are high quality on this but for about £50-£70 extra you can get teh pioneer 200s second hand which has effects, 0.05 and even 0.02+- pitch