An excellent job has been done on the re-mastering of the fourth season of TNG. A different effects house has been used compared to the maligned Season 2 and I'm happy to say that they have done an excellent job. Even though Season 2 had its issues, the HD picture was still excellent and Season 4 is no different, the colours jump off the screen and the series has never looked better. The surround sound is excellent and besides a few dodgy shots of the Enterprise at Warp, they have done a great job.
If you have the other sets of the series, you will not be disappointed!