I cannot do without this app now. Im so spoiled to being able to turn on the music I want from the notification center without having to actually open the music app that I cant go back now.
I also really like that it lets you use your own custom icons, and especially that it takes PNG files, so you can use an image thats partly transparent, and it will be transparent on the widget too.
I definitely think upgrading to the Pro version is worth the $1.99, mainly because you can control the repeat and shuffle from the widget and dont have to open the music app, plus being able to have more than 8 and change the size of the icons.