Difficult
I went here with family and friends over the 2005 Xmas holidays, and received mostly complaints for the effort. The problems were two-fold; one, a very different musuem environment, and two, visitor-organizational difficulties. From the very first this building challenges you as an odd coppery box. Galleries are mostly on the second floor and their organization is not tightly organized around a central circulation. This might not seem like a big deal but that's what my relatives chiefly griped about. As far as visitor organization, this place fails on some very basic levels. Signage for one. If you enter by the garage, it is not obvious where or even if you need tickets to enter the gallery. If you think you need to get in the long line line snaking out the 'front' door of the building, check again. When we were there, that line was just for the security check-in (flashlight in purse), and could be avoided by going around the side and entering through the cafe. You didn't need to bother at all if you came in through the garage. Food service was difficult too. We waited in a line at the cafe and noticed that there were small signs suggesting that there was a six-point process to obtaining food. I didn't read the sign closely because I was just interested in coffee. We never figured out what that was about because we were directed to a coffee and snack stand outside under an attached tent. Not great but ok. The way the garage works is a bit odd too. Some designer didn't study the circulation problems of not providing wide enough lanes that allow for traffic and pedestrian circulation as well as the difficulty of pedestrians milling about the parking ticket kiosks, spilling over into the vehicular traffic.
All that said, I had a good time here and thoroughly enjoyed the galleries. Next time however, I will eat ahead of time, get in the right lines for tickets and not take my friends and relatives.