Okay, so I just recently played Captive Curse and Alibi in Ashes, so I thought I'd share some of my overall thoughts of these games.
Both were generally good games, I do not regret buying them at all (well, actually they were gifts, but still). However, I found both to be really easy, so neither were really a challenge to beat which was somewhat disappointing.
Captive Curse I would buy just because of the location and music. I have a few friends from Germany, and the accents of the characters really brought back some memories of those friends. Also, the music was AMAZING. It always kept me on my toes and was probably the scariest part of the game. I liked the characters in this game, too (particularly Renate), and the graphics were really well done. So besides the lack of challenge and scariness (except for only three or four very brief moments in the game), I enjoyed this game and would recommend it specifically to younger players or people who like to be scared but don't want to have nightmares about it.
Alibi in Ashes was good too, except it wasn't all that challenging either (with the exception of two puzzles that I couldn't figure out without help). Most of the graphics weren't as cartoon-y as I'd heard they were, it was pretty much just Brenda who looked like a cartoon. I didn't think I would like having Bess, George and Ned in the game where we could all see them, but now that I've seen them for myself I think Her did a really great job (especially on George, she couldn't have looked better). I was a bit disappointed we didn't get to talk to Ned face-to-face like we do with Bess and George, but it was still really fun playing him. The main thing I liked about this case, though, was the general plot. It felt new and exciting, which really set it apart from other ND games. I would definitely recommend this game to younger players, but I think experienced players would definitely be interested in this game.