It has a very simple and basic interface that will cause you no problems when doing the conversion. You just have to select the file you want, the save location, and the final format.
It can also convert audio files so you'll be able to play any file you want on your mobile (on the condition, that is, that your phone possesses 3GP technology).
The main formats it converts are AMR, 3GP, MP3, WAV, WMA, MPEG, AVI, OGG, FLV, and MP4, you can also choose the quality when saving the files.
Finally, MikSoft Mobile Media Converter includes a downloads manager and Youtube video converter, meaning that with this tool getting your favorite video and audio onto your mobile is a much simpler process.