Who likes them?
Good/bad points?
Quite enjoying them at the moment
You're consistently surprising me. First Evanescence, fair enough, but now Arch Enemy? I've been working as a journalist in the field of female-fronted metal since 2003, so this area is closely related to my interests.
Good points - Angela's Vocals are good, she's attractive. That's about it.
Bad points - it's pretty standard and uninventive stuff as far as melodic death metal goes.
The very best melodic death metal albums you can find, in my opinion, come from the male-fronted side and would be:
At The Gates - Slaughter of the Soul
In Flames - The Jester Race
Edge of Sanity - Crimson [possibly the best melodic death album made, in my opinion]
If you are moving into melodic death, the only way to go is male-fronted. Bands like Cadaveria and Arch Enemy are poor imitations of stuff at the high end. I'd also mainly concentrate on melodic death made in the 1990s since the stuff made since around 2000 is quite clichéd and overproduced.
EDIT: If you really want to check out some more female death vocals, I'd recommend listening to Decadence's album The 3rd Stage of Decay.