How long have you use it?
I use it for over a year
What is the particular feature you like best and least?
What I like most:
Jog-size and weight, which leaves a good feeling in the mix
The 2-point hot cue for an instant reading boot
-The sampler, which is very nice

What I like least, the list goes on:
Quick jump-down, not rev prcise, perform all necessary and long
-Transition from the pitch bend mode scratch, need a good support down the key.
An mp3-only mode Bizard, which ragi not always according to the format (not quick jump for example)
BPM-counter not reliable at all (ok everything is in thoriated ear but ...)
Some-times, the pitch is several tens of seconds to perform all necessary for a dynamic mix, it's damn difficult carrment.
Rapel it loops and cue points in mmo, super long!!
De trs many bugs, despite Firmwire days. (Music playing in the middle of this cut, cue point that this alone without prvenir DCAL, cd not recognized, while the silent 1h before, ect ...)

Have you tried many other models before acqurir?
I tried Pioneer CDJ 1000 MK3, CDJ 800 MK2, CDJ 400.

How do you report qualitprix?
Poor quality price ratio, for a plate of this award, especially with the gear prtention "PRO", so many bugs and I think are default intolrable. I would never take the risk of playing live with this type of hardware, too likely to crash right in the set ... it's in home studio, and that's it ....
Exprience with, you will do again this choice? ...
No, for the same price, I would take a CDJ 400, although less provided as an accessory (sampler, hot cues, ect ...) but carrment more reliable. I have a cdj 400, which a year was never possible one bp, while the DNS-3500 will never s'arrte DCON.
I trsdu this kind of pb for a gear of this type.