I took delivery of mine at Fremont (in hindsight I should have declined delivery) and I was also told that 7 days is for QA/QC, which apparently wasn't enough given the various issues my car has right now that I am trying to get fixed by SC. Some are major issues, which I want to get resolved first. Despite these, I love my MX, nothing like it out there at the moment.
If you find even one major issue, based on my experience dealing with them afterwards, it is best to just have them rebuild if you can wait - saves you a lot of time and hassle later.
Congrats and good luck on the new car!