I use the Quad for a little Mixtrack months now with Serato DJ software but it comes with a limited version of Virtual DJ (complete for € 100 more), this is my first controller.
What attracted me to this controller is its intuitiveness: the colors are taken quickly bearings. The fact that he can do 4 tracks at this price turn is also a huge plus because I told myself that I would soon get tired of a simple "two tracks".
On the negative side I'll start with the fact that the filter (on Serato DJ) has no "benchmark" so it is impossible to blind dose (I had to make a small hole in the needle hot to create one). Another small weak point is that EQ are quite close to each other requiring a little more tact.
Despite all that remains for this price range an excellent choice as it is easily transportable I think I'll keep it long. I recommend first controller.