It says there is no cap on song cast time, but I don't trust the wiki.
Where? I'll go fix it. EDIT: fixed
Regardless why wouldn't you have a macro for putting on those boots and taking them off?
No sh*t, but they don't take effect instantly. In particular, they don't work while you're not wearing them, because you're just about to finish casting, but haven't actually finished yet. Considering they take a second or so to work, as well as being able to move before you finish a spell, you can often cast your buffs, and get out of range before you even get the benefit of move speed gear. That's the main advantage (plus being able to use serpentes, etc).
As i've said repeatedly, it's pretty small, but there aren't any good brd atmas after minikin. Edited, Nov 16th 2010 5:28pm by ThePsychoticOne