Which do you mean? Git-GUI is not "very nice" by any means. TortoiseGit is decent but a new Git user is hardly guided there (compare that to: http://mercurial.selenic.com/downloads/).
Also, my point wasn't specifically about GUIs per se but about usability overall. Git developers have only very recently, and only very grudgingly it seems, accepted that usability is even a serious concern. Considering that a developer will have an enormous amount of interaction with source control tools (almost as much as with an IDE or build tools in general) usability is obviously a huge factor. Git has a lot of the technical aspects nailed but I would be shocked if it won the current battle for revision control system of the future.
Also, my point wasn't specifically about GUIs per se but about usability overall. Git developers have only very recently, and only very grudgingly it seems, accepted that usability is even a serious concern. Considering that a developer will have an enormous amount of interaction with source control tools (almost as much as with an IDE or build tools in general) usability is obviously a huge factor. Git has a lot of the technical aspects nailed but I would be shocked if it won the current battle for revision control system of the future.