I have around 60 complete Rings and I find this the overall best. The sound is magnificient, the conducting highly inspired, Böhm could be very dull sometimes but certainly not here, Nilsson is unapproachable, Wingassen his reliable self. If you like Theo Adam is a matter of taste, I have heard his Wotan live, and I am impressed. The price for this edition is unbelievable and I think this is the right buy if you want only one Ring.
Buy the way, when rehearsing this Götterdämmerung on stage Böhm uttered: "You are the best Brünnhilde I have heard for more than forty years". And Nilsson rapidly answered: "And who was the better one"? Nilsson knew her values, but she was also a humble person, always supporting collegues. When in the Götterdämmerung performance recorded here Martha Mödl, earlier a fantastic Brünnhilde herself, had finished her part of Waltraute, singing this mezzo role for the first time, Nilsson whispered in her ear "That was very well done".
(To celebrate some sort of jubilee in Bayreuth this summer Philips has published the original very luxury box of this Ring - on 16 LP:s! Quite another cost there, more than £200...)