We went to DLR twice during the NBC layover, and it it GREAT!!!!! They do such a wonderful, professional job, that anyone would enjoy it.... And when we went, I had not seen NBC, so I was expecting to be dissapointed. But it went WELL beyond anything I had imagined.
Just a side note, I grew up in So Cal, so I grew up going to DL. When I went to WDW as an adult, I was, and still largely am, dissapointed in the MK. DL is MUCH, MUCH better than MK... and the HM in DL is one of the attractions that is not as good at MK. So, even though I enjoy the MK, and I adore Epcot, DS and AK, going to DL is like going home, and I do enjoy it SO much more than MK. I tend to get lost at MK... things are put in different places than at DL, and I feel a little out of sync... like I am somewhere, but not quite in the right place!
Anyway.... if you do get the chance to see the NBC layover at DLR... do it! It is super!!!