I've been using Apple Pay from my watch since I got it, but only 2 weeks ago I found out I can pay for the Bus and MRT with my watch also! So I no longer need to carry around 1 additional card. (Singapore)

Something I just found out on Friday when my iPhone battery ran out while at the store: my Apple Watch could still make a purchase even though it didn’t have a cell connection. Pretty great!

Yep, I realized the same once when I didn't have my phone with me. It's just representing card data to the scanner, so it doesn't need a network connection.

Yup, some niceties like transaction finalized notifications don't catch up to your watch until you have a network connection, but nothing show stopping. (Your phone often still gets them immediately, but obviously if you don't have it with you, the tree fell in the forest and you don't know if it made a sound.)

It’s useful for some situations where there are obstacles, for example drive-thru checkouts at fast food restaurants or gas stations.

Yeah, in general too many places still put the NFC readers too close to the cashiers because they still expect people to hand over cards like its 1999. Getting a watch near to some of those readers is far easier than most phones.