well its been almost 9 days since i got my top of the line 15 retina. The first 1 was changed at store due to dents and second one 3 days later due to a failed hardware test. This one has been good but since this morning I have been noticing some weird clicks from the bottom case around the area where theres printed stuff right upto the region where the battery connector is on the logic board and between S-L keys only. When back home i like to relax on my bed with the lappy on my chest and carry out my mails and a bit of podcasts, thats when i noticed it. I will post up a video in a few minutes. Out here in India its pretty hard to get a replacement in 14 days unless they diagnose it as a hardware fault or else they repair or replace parts.