We booked a hotel in Liverpool through Trivago so we could go to my brother's funeral. At 9AM (one hour before the funeral) we went to leave our bags at the hotel and were told that they had had 40 bookings through Trivago, all of which were rejected. None of the Trivago customers were informed and they all turned up thinking they had a room and were all stranded in Liverpool. Luckily the hotel had had a cancellation and were able to give us a room. Trivago didn't contact any of the customers to inform us.
If you can't rely on them to make the booking or to inform you if it goes wrong then what use are they?