I think it's a sweet name with a great meaning. In my area, it isn't too popular, but if I were in England or Wales, I wouldn't use it because it is too popular there.
I know someone with a sister named
Phoebe who has English parents. Aside from her, I can't think of any other people I have actually met named
Phoebe.
I prefer
Phoebe over
Phebe.
Phoebe looks more complete.