it is a good time to note that the Blue Icicle is an ancient product at this point, with an "first available date" listing for June 17, 2003 on it's Amazon page.
with that said, I own one and use it daily for over a decade without any failures or hiccups on multiple microphones of different styles, all from half a dozen microphone manufactures, and on all 3 major operating systems.
if a featureless XLR to digital conversion with phantom power is all you need, then I can highly recommended the Icicle. it just works