Fit: I would have given it 5 stars if it fit better with larger cases. I have the InCase clear case (also sold here) and that fits with no issues. Cases with a thicker area around the lightning connector will not fit, as my other case (Incipio Stowaway) did not.
Sound: loud and clear on both AC and batteries. I like that the batteries are not rechargeable.
I wish it had a remote, and a carrying sac, even if it would cost a little more.
But at the end these are minor annoyances, I guess. The function and form are why I bought this, and I like it.