Among the Korg Volca line of very compact, inexpensive, extremely powerful and capable step sequencers, this unit stands apart from the other three in a seperate class. The Volca Sample allows the user to choose from a stock library of 100 or so samples, and since no producer can just "stick with stock," and Korg knows this, they have included the ability to download additional software to upload you own sample files in high quality .WAV format to the device. This makes the Volca Sample a pure powerhouse in custom DJ production. You could, for example, load all of the samples from a now extinct synth, or of course: make your own sounds from scratch to use in any combination or all of the sequencer steps. The other variables that come with the Volca, ready to tweak are world class Korg filters and despite the size and price- all of these features make this Volca anything but a novelty or toy. This is a professional production tool to be sure. To top itall off, Korg publishes the schematics for their Volcas and even prints common soldering points on the circuit board, ready to mod for those not afraid to solder a little bit and further expand the Volca capabilities. I have given all my Volcas MIDI OUT with DI?N sockets or via USB, as well as other Volca model specific mods. The Sample, and all of the Volcas are totally worth their price, and then some. They are UNDER priced, IMO. NOT owning a Volca or two or four is a crime once you embrace all they can do.