Stayed there this past weekend. First time in the Tower and first time at Coronado. Had never even been to the resort before, only driven past.
My Disney travels have mostly been at the deluxes, with stays at AoA and CB as well, so that is more or less my frame of reference. I have to say, I was really surprised/impressed at GDT/Coronado - we had an excellent stay... and for the price this place will definitely be on the "will do again" list in the future. Absolutely beautiful grounds, abundant food options, the Tower is so fresh/new. DW and I could have had multiple date nights around property with the various dining options - water front, roof top, etc.
I also came to appreciate how Coronado is a relatively central spot to the parks. Not too close or too far from anything, and most park trips are a straight shot away with just a few turns / lights.
It was just a three night stay and I'm sure there are a few flaws that were hidden with the excitement of something new, but I'd give it two thumbs up for sure.
(Only quasi-material issue with the room was the fire alarm speakers emitted a high pitch electronic noise. Sounds weird, but it was noticeable and I've seen other people report this. Not sure how prevalent it is across most of the tower?)