The Assault Shroud's cool and all, but I find it a bit too bulky for my tastes. It takes away too much of the Duel's original agile appearance. The detail on it is supurb, and it looks pretty badass in general, but I've always been more for down-to-earth kind suits that aren't all armored up with extra bits and pieces everywhere.
Can't really deny it being useful, battle-wise, though. In the last few episodes of SEED it was pretty effectively used as both protection and decoy by Yzak and was key in taking down the Forbidden Gundam.