It's tragic that this is (probably) the only workable SoulSeek client option for OSX. iSoul showed great promise, but it was abandoned years ago and never made it out of pre-final-release. iSoul is stable and works okay for those who only require the most basic functionality (and that may include many people), but for those who require the features and functionality SSK-QT may be the only way to go (sigh). Very sad given how incredibly ugly it is.
SoulSeekQT has an absolutely awful user interface, isn't particularly intuitive, and in my experience is rather unstable, particularly when doing searches, and even moreso when closing multiple search tabs. One especially annoying thing is that after having selected a folder to download, if I later change my mind and attempt to cancel, it will just skip to the next file in the folder and start downloading it. So you have to cancel that next item and the process continues again, and again, and ..... until it finally reaches the last item in the folder. Absolutely idiotic! This is a well known issue, unresolved for years, that the developer seems to ignore.
The system requirements here show " OS X 10.6 or later" but that's been out of date for some time now. That should read " OS X 10.7 or later." The last stable release for 10.6 was from 05-18-13.