I like it. I don't know if I'd use it - it's not really my style, not simple/earthy enough. But it's a great name. Too bad the only obvious nicks are
Pris (which I actually think is a totally cool nickname, but I guess people would object),
Sissy, and
Cilla which becomes Silly ... *sigh* Anyway I think the full name could be used all the time and it'd be fine.