I've use the LO Monday sMILEs a few times. The YQ is next to nothing in comparison with what you pay on LH and the miles needed are 5K/7K for one way/RT, which is a great deal. You just call them and book it. No need to worry about which country you're in.
The downside is that it only seems to cover Y redemptions, just like the LO flights that feature on LH's Mileage Bargains. It also only covers flights for the next month or so.
It's a different promo that appears every 2 weeks rather than monthly.