Yaksu

Nice clean station. Has a convenience store by the escalators above line 6, a shop that sells waffles, manjoo, and coffee and toilets between lines 6 and 3. Also has staff onsite and disabled access to all train platforms. The walk between lines isn't far but you need to go up two sets of escalators from line 3 and down one set of stairs to line 6

Transfer to Itaewon

It is good for local residents to use it together.

Just turn on the faucet and the spring water will just come off.

It's more crowded than I thought.