The Blu-rays for the TOS and TNG movies are not bad, and IMHO, The Motion Picture and The Wrath Of Khan look fantastic. The others I'd rate as overall pretty good.
The sound on TMP is awesome, and I prefer the sound mix I heard there to the Directors Edition revised mix. Jerry Goldsmith's score comes through so sublime it's unreal.
I'm actually very happy with the Blu-ray sets. The only 2 things I want now are a high-definition recreation of the work for the Director's Edition, and the resoration of the special features on that DVD, along with maybe an extra documentary about the Blu-ray re-rendering of the effects.
If they create better transfers of the movies to address the DNR / Edge Enhancement issues, all the better, but I'm happy with them.