I had a $25 Amazon gift card, so I paid $39.99 for the set. I sold the DVD set for around $20, so I paid $19.99 to upgrade. I'm glad I did.
So far, I've seen the 1st two episodes. Yes, I notice the mediocre effects shots, and the disparity in smoothed-vs.-natural live shots, and am disappointed in them.
Yet, overall the increase in resolution, color accuracy, and lossless audio make it a worthwhile investment.