It has a very clean and intuitive ui, the application starts up fast and has a fast audio processing, and includes many audio filters and effects.
Schism Tracker supports it, xm, s3m, mtm, 669, mod, mdl, mt2, stm, far, ult, med, ptm, okt, amf, dmf, imf, sfx, mus and mid file formats.
Runs on almost any platform that SDL supports, and has been successfully built for Windows, Mac OS X, Linux, FreeBSD, OpenBSD, AmigaOS, BeOS, and even the Wii.