Recent profound and fundamental changes in information technology and electronics have led to a change in consumer habits, which also characterizes the tourism sector. In the e-world, consumers' information search and communication habits are changing; we are living in an era of a communicational paradigm shift. Online Travel Agencies (OTA) are not only the dominant channels of booking and sales nowadays, but also the channels of information gathering and guidance in the accommodation-related information of the services. Some of the information on OTA is objective; others are subjective - the latter being consumer information and opinions. Subjective information about the accommodation is provided by guest reviews on the OTA websites.
The present research aims at comparing the guest review systems of Hungarian and international OTA websites, in terms of authenticity, scale, the applied system of criteria, and the possibilities of guest evaluations broken down by target groups. In addition, this paper presents the OTA guest ratings of two accommodation establishments of the same category - located in the same destination - on a case-by-case basis, seeking an answer to the question of how consistent the results - as a whole and in terms of criteria - are for the consumer facing the decision.
In the further primary research part of the study, the review rating and customer feedback for satisfaction analysis is also presented based on professional interviews with hotel professionals.
The results reveal that the guest ratings, which provide the OTA users concise information about the accommodation establishment, are influenced by the scale and the categories (besides the calculation of the overall experience score) applied by the OTA, and the number of reviews, because a higher number of reviews gives a less scattered, more correlated with the other OTAs ratings.

Keywords: e-tourism, OTA, guest satisfaction, e-WOM, guest reviews