I must admit that I can only agree with the critical voices here.
I had visited the memorial back in 2006 and must say that I strongly disliked it.
Just to make it clear: I do not object to the existence of such a memorial or to its size or cost (as many voices - not only from political right - did.) Yes, there absolutely should be such a memorial in Berlin and never mind the ground it covers and the money involved, but... Was an assemblage of angular concrete blocks really the best we could come up with?
The Dachau memorial site had a powerful emotional effect on me. The Pinkas synagogue in Prague - whose walls are inscribed with the names of 80,000 Holocaust victims from Bohemia and Moravia - no less so. Even the memorial in Vienna is effective.
But to me, the one in Berlin looked and felt like the storage yard of a building material manufacturer.
Guess you can tell that modern art is not exactly my thing.