It is a useful tip for our german speaking members. A hotel review on HolidayCheck is made in 1 to 2 minutes. For every review (up to ten per month) you get award miles on your Miles and More account. Just enter your Miles and More number at the end of the evaluation section.
In August, instead of 100 miles per review, you will receive double the number (200 mile per review) on HolidayCheck, so that with ten reviews in August you can generate 2,000 award miles for free.
Remember, you have to stay in these hotels to review them.