I have been using Traktor for about a year now and with the Kontrol s4 and was looking for a more portable option for some gigs. The modular approach makes a lot of sense to me as I can tailor my equipment portage to the gig requirements. The X1 does exactly what it is supposed to do in a compact package. The workflow is relatively intuitive however very limited. The thing I miss most about a more comprehensive controller is the lack of ability to do manual beatmatching as this is my preferred mixing style. I have only used the factory mapping and have not delved into customizing it myself. The factory settings are pretty good though. The build is attractive and clean, however I can not speak on its durability as I have not even gigged with it yet. Overall I recommend this product and and pleased with the purchase.