The biggest drawback of Topolino's is you have to get there, since it's at the Riviera. You can't park there all day, so leaving on Disney transport is not an option if you drive. Topolino's is also incredibly hard to book, so unless you have a long stay on property, I wouldn't bank on getting it on your 60 day mark.
You can watch a bunch of recent character meal experiences on
YouTube. None of them are bad choices, and since the switch to family style, the food reviews have been positive at all of them. Some are ranked higher, but you shouldn't have a bad meal at any of them right now. I would base the choice on which characters the children really want to see. They all have Mickey, but not all have Goofy, Pluto, Minnie, Donald, or Daisy.