Very much hit and miss for me.
The Vornholt and Greenberger entries didn't really do it for me, the characters felt off in a way, and the entire story line about a 'ghostship' was all a bit out there. The storyline involving Kyle Riker was also one of those farfetched concepts for me.
The reason the Ward/Dilmore, Mack and KRAD entries work so well for me, was mostly the character work. I had no problems seeing Stewart as Picard in their entries.