> I'm still of the opinion that using APR's to describe a loan held for ~a week is about as useful as the weatherman giving you the forecast in degrees kelvin: technically correct, but completely worthless.

It's a comparative figure, which is particularly important for underscoring the consequences of owing money in the long term.

> "Get $300, pay it back plus $30 a week later" is much more relatable.

That's certainly OK to show in the UK, you just also have to show the APR.

> And isn't a bad deal, when you need cash now.

Assuming you can pay pack $330 next week and don't need to borrow $330 to pay $363 the week after...

> "Missing a payment" isn't even a thing you can have happen on most classes of payday loan. You have to provide a pay stub, and a post-dated check, and the money just gets taken out on the day of.

Again in the UK, but this is certainly possible. A post dated cheque can bounce, and should never be given out in the first place (you can cash them at any time).