I have, and use a lot Droidsound. I have not had any problem using it.
I have a directory on my SD card, in the root, called MODS. I have just placed some nsfs in that directory and made a rescan database in droidsound....
Droidsound does not support all expansion chips, VRC7 comes to mind as being unsupported. Fortunately it does support ZIPs as well. If you want to keep your SD card fairly clean, you can drop a ZIP file into the MODS directory.