The legs do have some issues, but even just standing straight up, you can still pose his arms. He can do the classic Laserbeak-on-the-arm pose.
I like to flip the right-arm kibble forward to use as a cannon (w/ a bit of imagination).
The bomb-weapons do indeed stay put in alt mode if you install them right- it's tricky, and it's not indicated in the instructions, but there is a way to orient them so they lock in tightly.
He's a great fig, 2 good modes and great accessories. Not terribly poseable, but a great display piece.