I shall just point at glockgal's review and say "the same", yes?
No seriously, this is made of awesome. I love how we see things through James' eyes and what he sees really changes things between the Marauders. I love that it isn't you as the writer who's revealing things to us, but that it's James - especially when it comes to the Lucius/Sirius part, where so much still lies in the dark. Which, to me, makes this so compelling - the reader only knows as much as James does, and that really isn't a lot. Just. asdfghj. Awesome! The dialogue is great, as is the whole atmosphere and every single interaction of any character with any other. Much love for this! ♥