Yeah, it’s nice seeing Star Trek with modern effects. But I think the enhanced versions lack some of the charm of the originals. It would be nice to have an ‘as-filmed’ set of the series. (Though I’m not a huge enough fan to get VHS.)
I actually love them. When I bought them I expected to watch the “new versions” once and watch the classic versions but in reality I found the opposite is true. They look great and the updated effects are well done for the most part (you can see they did get better as they went along).
I had the DVD sets as well and I think these are worth getting as replacements. Especially if you can get them at a reasonable price.
Something else that’s cool: if you get Season 2 it contains the DS9 Episode Trials and Tribble-lations as a bonus.