I have owned these amazing players for around a year, the first thing to say is they sound brilliant, very accurate indeed. If you use these with MP3s i would strongly recommend only using high bit rates, or purchasing Platinum notes, as the crowd will head the difference in quality and volume while your mixing. There are a few very very small things that niggle me, firstly the pitch shift is exceptionally accurate, but it does not click when in the center which would make it easier when creating your own echo or flange affects, while using the cdjs. also there are no inputs for devices such as ipods (which Pioneer are very capable of, i also have their cd player for my car which does have an ipod facility, also brilliant sound!)
While reading MP3 cds it is not as fast at mapping out your track as it is with non mp3 cds.
These players do not jump regardless of how they are bashed around, you can lock the eject key so someone cant come along and press it and spoil your set (or to stop you from doing it yourself). The vinyl mode on this player is great, however you do not get a spinning platter like you do on the technics cd players, but these win in every other way.
The Wide Mode feature allows you to slow the track down to 0 beats per minute right up to double the speed, which can be great for adding affect sound, vocal scratchin etc.
You can record your hot cues and loops onto the memory card, if you do lots of different sets with different genres of music i recommend getting a few SD cards to make it easier and less confusing while your doing your set!
I tried alot of cd turntables before i decided on these, and i believe these are the best all round.
Conclusion:
These sound great, feel great, Very accurate. not fully future proof, with the Pioneer DJM700 you can control the CDJs and software such as traktor! ( unfortunatly i don't have 1 yet) and they look lovely, and make other equipment look outdated.
Hope it helps