I know roblox has a default leaderboard, not that complicated to use, but I still think making a GUI is easier. Let's say you have a Money counter, instead of putting in in leaderstats and all that you could just make it in a TextLabel and design it, and it's easier to access.
I'm thinking about making a shop and a XP/Lvl system, but I don't know if I should use RBX Leaderboard or Leaderstats.
Pros and cons?
Making GUIs is actually harder, and there is page for Leaderboards in Wiki: http://wiki.roblox.com/index.php?title=Leaderboards Might help, if doesn't, then I am sorry.