After being bombarded with television advertising by Trivago, I decided to test them via a booking in Pacific Grove, California, on the Monterey Peninsula.
Trivago did not recognize or recommend ANY Pacific Grove accommodations in its first 10-12 offerings but referred me instead to much costlier places in Carmel, highly inconvenient for Pacific Grove. I have no explanation for this but it could be due to (1) incompetence on the part of the company or its IT staff or (2) their being paid in some way to recommend costlier places that are not near or (3) their desire to acquire higher fees by offering costlier places. Whichever applies, it's not plain, straight dealing and I find it highly objectionable.,
As an example of this deception, they cited "distance from Pacific Grove" as 0.2 miles, whereas the actual driving distance is more like 5-6 miles--but they could claim the city limit as the "distance" since the two towns are adjacent. Cute,, eh.
I searched further and found Pacific Grove places (which I knew from visiting there many times truly existed) and made the reservation I wanted to make.
I would not trust this organization despite its extravagant claims.
Bottom Line: No, I would not recommend this to a friend