2 weeks ago the store in Newmarket opened. They had the same official opening ceremony, free Mickey Ears to the first 500, and Mickey and Minnie where there for the meet and greet.
Now... as tempting as it sounds. I wouldn't go back.
Reason
We arrived at 8:30 am for the opening at 9:00. We were already about 400 people back.
Mickey and Minnie were there for the official ceremony, turn the key, etc. Then they started letting people in the store. They let small groups at a time, to not avoid a rush... We didn't get in the store until about 10:30.
Right when we got in, I asked a CM where we can meet Mickey and Minnie, and they said they were NOT in the store...

We waited 2 hours - just to walk in the store?

The meet and greet was at the centre Court of the mall from 11:00 - 3:00. We took a quick walk through the store, since we waited so long to get in, then headed to centre court. Wouldn't ya know it... there was a line there too.

That line was close to 2 hours as well.
If I knew the meet and greet were in a separate spot, I would have got right in that line. Anyways, we left, did some grocery shopping, and returned to the mall around 1:00 pm. At this point the line for the meet and greet was about 20 minutes. We waited.
If it is the Store you want to get into - here's my advice... Even though the "official" opening is Saturday, the soft opening is likely the Wednesday before (It was in Newmarket).
If it's the meet and greet you are looking for, find out where it will be, and get right in that line.
If you have to be part of the mob to say you were there, in the store when it officially opened... by all means, wait in the line... at least you are now informed of the process...