All in all, the restored Walkthrough is, in my opinion, nothing short of a crowning achievement for WDI. It's these sort of small, detailed, magical experiences are what set Disney apart from the rest, and hopefully the opening of this is the sign of a shift in thinking and will lead to more quality experiences like this in the parks
The Accessible Experience room is lavishly themed, but nothing terribly remarkable; it's just the CGI Walkthrough recreation that was included on the Sleeping Beauty 50th Anniversary Platinum Edition DVD. It is presented on a big screen. I'm pretty sure it was a great big high-def TV, but could have also been rear-projected. Nevertheless, the show is nicely presented and features closed-captioned narration.
I highly recommend going through the Castle if you can handle the steps. It's a fantastic experience. I do warn you, however, that it can get pretty hot inside, even in the cool fall evening temperatures that we're enjoying tonight, so if you are already wary of tight, narrow spaces, the heat mght make your claustrophobia worse, so if theres a long line expect the inside of the castle to be pretty full and consider the Accessible Experiece instead.
I'll have photos of the walkthrough in this Friday's Dateline Disneyland.