First of all, the Blu-Ray image and sound are exceptionally good. The image has excellent depth and clarity, and the DTS track is outstanding. The disc contains a good variety of highlights (not complete scenes, but long enough to give you a good feel for the production) from each of the four operas.
I was impressed with the lighting and video effects throughout, and overall, the singing and acting are of consistently high quality as well. There are some costumes that I didn't like at first, but having watched it several times now, I'm getting used to them. I don't mind that they mixed styles ranging from a Flintstone-style bone bodice for Sieglinde, to a futuristic belt that looks like something out of Kubrick's 2001 for Wotan, but some of the choices are just weird. It also took me a while to get used to seeing singers hoisted aloft on hydraulic lifts, but again, it's just a new way of seeing things. I had been a little apprehensive about the acrobats, but they sort of blend in with the rest of the action and I didn't find them at all distracting.
The high point for me was the way the videos and the lighting were so brilliantly used to underscore the music. This Ring is so visually appealing that I'm willing to forgive a few unfortunate costume choices as well as a couple singers who are truly Wagnerian in size. For the price, it's a great way to get a good look at this production and decide if you'll want to invest in the entire set. I'll probably be ordering it after I've watched this a few more times to see how it holds up over time, but so far, it keeps getting better.
Edit: After watching this at least 5 times (yes, it's that good), I ordered the entire set (at a great discount from another retailer, sorry Amazon). Any reservations I had about costumes, large-scale singers, and the hydraulic lifts have disappeared with repeated viewings. The production values, the musical performances, and the Blu-Ray's outstanding video and audio quality won me over and make this set indispensable.
I forgot to mention in my original review that the subtitles are done really well, too. They are clearly visible, but they don't intrude too much on the image. It looks as if they used a narrower font size than the Levine/MET production. Also, this sampler disc includes two features about the stage director and the video creator. Both features are very well done and help the viewer to understand the concept behind this production. Both are presented in HD. At this price, I can highly recommend this disc to anyone remotely interested in the Ring or this production. Just give it a chance and let it grow on you!