We've stayed there numerous times. The lobby Starbuck's can get very crowded if there is a convention there, but otherwise we love being able to get our coffee before heading out in the morning.
The cell signal is terrible for us in the lobby, so just don't relay on that.
We usually walk to the parks in the morning going straight down Harbor or walk to the DL hotels going through the Convention Center, across Katella to
Disneyland Dr.
At night we take the Toy Story shuttle back.
If you can snag a corner Disney View room, the ones we've gotten have been huge.
It does probably need a refurb, but we've never had any maintenance or cleanliness issues.
The breakfast buffet is great, but pricey unless you get it free because of your Hilton status.