I can't speak to the lounge, but I found security and passport control pretty easy when I was there last week. 2 warnings: if you're checking bags, you must be at the counter no later than 8:45am for the 10am flight. Any later, and they close the counter (we had to beg to have them re-open it). Second, the gates in T1 are a loooooooonnnnngggg way from the check in counter, so leave a few extra minutes to make the hike down to the gate area.