We recently stayed at the GCH and were not "wowed" by it as much as I thought we would be. I grew up always wanting to stay there, because I thought it would be such a dream to be right there in the park and be able to look over the balcony and people watch during breaks at the hotel. We could never afford it, though, until recently and stayed there last October. I was soooo excited and watched countless videos and read hundreds of reviews, anticipating our magical stay.
They do have an entrance to both DCA and DTD, which is very handy.
We more than likely won't stay there again. The hotel is just not "Disney" enough for us, the rooms are small, the hotel is dark, the hallways are long, and people are always hanging around the lobby making it feel congested (at least in our experience). I feel better in rooms that are more light and spacious which is what we find at the DLH, I just felt the GCH rooms were too similar to other hotel rooms we've stayed in with the wood paneling (obviously this is a preference that some people like). The bathroom was also not convenient for changing/getting ready in the morning if you want to change privately/away from others. Don't get me wrong, it's an awesome hotel (in terms of the sheer massive size and the CMs are always a bright spot), but
Disneyland Hotel will always be our favorite.
Have you checked into staying Club Level at the Disneyland Hotel? That is a fabulous experience and one I highly recommend. Worth every penny, even though the rooms run about $950-$1000 per night.
If GCH is a bucket list item, it may be worth it to stay and get that experience for yourself though. It was helpful for me to know that I already experienced it once and didn't care for it so am now free to keep staying where we enjoy.