Bought Poineer DJM400.. what to buy with it?

[Rockfella]

A friend just bought this:

Pioneer DJM 400.

DJM-400 2 Channel Effects Mixer - Pioneer Mixer

He has been told to get:

Maya44usb

ESI - MAYA44 USB

to use it with a laptop.

Anyone with first hand expericence using this/any suggestions for getting something else?

TIA.

Vivek.