I have yet to have single technical problem with the new website, and I use Chrome on an Apple Macbook Pro. I even log in with my account sometimes, and Mr. txaggie94's account other times, so I have the capability to REALLY confuse delta.dumb.
I've got 6 reservations right now - I've been able to view all of them, request EC seats (except the stupid Virgin Australia-operated flights for the beginning of February), and see all my activity.
I'm just waiting for my issues to show up.... I'm sure this post will ENSURE I have an issue soon!