We had an urgent need to replace a Flash-based player and the first extension we bought didn't work right off the bat. We didn't have time to troubleshoot the problems with that extension, but luckily we found the SJ HTML5 Audio Player and it was a lifesaver! It installed and worked right away (for the record, it cost $15 less than the one that didn't work!). We had a few questions so we contacted SuperJoom support on three separate occasions. They were responsive and polite and they even made some tweaks to the player after we gave them Joomla admin access. A great experience all-around! Highly recommended!!