I've been using Music collection, and I'm loving it. I'd got some problems and bugs submitted to the support teams throu their forum and email. Surprisingly the helps were quick and good! They helped me to fix all bugs and made the component running for my site, and as they have promised, any bugs will be fixed as long as they find out.
If you are looking for a Music component for joomla, I'd highly recommend THIS ONE, simply the best, easy to use, great supports, friendly lay-out.
I and my users love it!
Keep up the good works, guys!