Well, who knows. I did online checkin for this whole trip we are still on. It hasn't been quick for ANY if it.
For POR they didn't have two of our three names and didn't get the CC info even though you can't do online checkin without CC info.
For Kidani our keys didn't work, meaning we got to walk the three miles, ha ha, back to get them checked out. They reprinted then ran them on the scanner thing and they weren't active. Reprinted, the staff ran them up to check at the door and they worked. After a few inroom issues (the washer hot/cold issue is still happening, fwiw) when closing the door one day the RFID reader on the door fell off.
At SSR again they didn't have a CC on file, even though our packet SAID CC on file.

. We went off to AK then got a phone call that we had to get all new cards. When we were done with the park and went back, they made us all new cards (8 people by the way) and we went to the room. The room had a SERIOUS mildew smell* that instantly affected me but for some reason I said we would wait to change until the next day. DH got a manager involved so we had notes on account that we could move. Next day (yesterday) we moved, got new cards. DH went to front desk to add charging and it caused such a huge problem that he was there for nearly two hours. They had at least three people involved in figuring it all out. I mention this because they said that the first problem is a glitch they've seen with online checkin recently, where you get stuck in checkin "status" and the cards won't work. Except that we had just used a card to get back through the gate but whatever. The second day problem could also happen on the first day, if the CC didn't come through and you wanted to add it.
I'm afraid for tomorrow's arrival at VWL. Wonder if the CC info will be there, if the cards will work, if we will glitch again (starting to feel like Vanellope here ha ha), etc.
I was one of the first that I noticed here to be able to do online checkin before ten days out with
DVC reservations, and while we have gotten really good rooms in the exact spots requested (though we had to move areas in SSR from the requested spot), I'm not sure that all this wasted time along with the annoyance is worth it!
Best if luck to YOU, and I hope it all goes perfectly.
*the housekeeping manager came by as we were packing up to move, asked what the problem was, so I invited him to step in and take a sniff of the air. After that he practically put up a crime scene tape it was SO bad. We were in 1135, which is supposedly out of inventory now until they get it figured out. It was awful, even DH was bothered by it and he NEVER notices that kind of thing.