Beware fake hotel reviews

In our two weeks in Vietnam we stayed in a number of hotels that rec'd all 9 and 10 reviews in booking.com. However the reality of the hotels was not what we expected from the reviews. Bugs in rooms, poor showers with little or no hot water, noise, bad food, etc. When we left reviews that accurately reflected what we experienced, for example, a 4 or 5 rating, the hotels immediately reached out to us offering a full refund if we removed our review. We refused, because we want to offer honest reviews and encourage the hotels to improve their service rather than rely on comped fake reviews. So travelers, caveat emptor!