I have run Madbox as my daily driver for so long I can't remember - starting with version 12.04, which is still running my media PC and another PC. My laptop is 14.04, which, while taking a little getting used to, has been amazingly stable and good to my machine.
I'm not a noob by any stretch but I'm also not a computer professional, and there are challenges running this OS but you will also learn a lot.
Bottom line - its super lightweight and you have everything you need. OpenBox is a bit of a challenge but once you understand how to edit the menus you are golden!! Basically open menu.xml and use the conventions for the other menu items to create new ones with the apps you want handy.
This is a phenomenal OS if you want to learn some linux and breath some life into an older computer that can't handle the bloat of a bigger OS.
Great low resource option for those familiar with Ubuntu. Works fine with older netbooks like Acer Aspire One.
Not much documentation but then Ubuntu itself is well documented and most how to's work here.
No menu for applications so a bit of guessing and browsing needed. Open synaptic from a terminal and see what's installed..