I'm unsure what else there is since "pretty much" implies an additional element, but this is presumably most of it.
Source: http://www.totalxbox.com/80327/assassins-creed-unity-wont-be-compromised-by-its-microtransactions/?OXM said:Assassin's Creed: Unity is the latest game to let you "fast track" an unlocks system by spending real money, Ubisoft has revealed at Gamescom 2014. Speaking to OXM after a presentation, senior producer Vincent Pontbriand commented that this is "pretty much" as far as microtransactions go in the game, and assured us that the developer won't adopt such models unless they make sense with the experience.
Exactly how the system works has yet to be explained in full - the build I saw wasn't final - but it appears that you can spend money to "hack" unlocks such as gear rather than earning them through play.