I haven't been in the lower tier yet. I keep meaning to go down the stairs just to see what its like at half-time, but being in the South-west corner, it would take several minutes to get there at half-time as the South stand upper is really congested. The island concessions take up too much room and most of the toilets have too few urinals, meaning the queues completely fill the inner concourse at half-time. If you're near the South-east corner, you can at least move around to the east stand, which is far less congested as it has two levels of concouse serving the upper tier. Unfortunately, people seem to be more attracted to the windows of the south stand concourse area.