XBMC gets released almost every day by someone or other. I tend to use the T3CH builds. Every one I've installed has been fine. I tend not to update them too often though or I'd be doing it 4 times a week!
Its not too difficult to do. As long as you're comfortable with FTP that is
There's also Autoinstaller Deluxe 2 if you can get it which will do it for you though it is an old version...
I'd recommend XBMC to anyone though, I love it.