This plugin is a very easy way to make your page's content more interesting and organized. The photo gallery feature allows me to put all the pictures I need on my page without having to go through the hassle of using all kinds of different websites or software; it's very convenient.
The music player is SO nice. There are several different skins you can use, which allows you to pick the best one for your site. It's also VERY nice that I don't have to use any of MY space or bandwidth; Cincopa takes care of that so I have room for more of MY stuff.
Overall, I really like this plugin and it doesn't seem to have any problems or inconveniences. It's very easy to use, even if you're not exactly "tech savvy." Definitely recommend.