I played it a few weeks ago. It's a solid, really enjoyable chunk of game. Think it took me about five-six hours to get through.
The mobility of DK is mad overpowered but it makes for some incredible chained moves.
I can play both SNES and SFC games on my online-enabled UK account. Had to download the SFC app using a JPN account, but can't actually play the games with it. Has to be the UK one.
Edit: Same as Santa's Boyfriend said.