We ate at Mongo's during the week. On the menu outside, under Mongo's Total (All you can eat), it says that soft drinks and beers are included. Unfortunately, when billing, it turned out that the drinks were not part of the offer. There is also no dessert included in the price. At almost €36 per person, we felt this was too expensive for the existing buffet selection/offer.
However, the food is good so far. The different types of vegetables and meat are fresh and clean in the buffet counter. There is a good list of sauces for allergy sufferers (there are also many gluten-free sauces/dishes available).
The service was friendly, quick and attentive.