Marathon Bet has a "Good" rating which does them a disservice because, in reality, the odds are better than good, they are fantastic. On normal football games, they are nearly always a market leader on at least one selection and they regularly run promotions where the top five European Leagues are 0% margin meaning they can be best priced on EVERY selection at times.
The odds available on other sports and lower leagues are not quite so good, but they are still very competitive and there is nowhere that Marathon Bet let themselves down.
We looked at the most popular European leagues and chose the most high profile upcoming games of the week. We study a mixture of the match odds and also the over/under 2.5 goals markets. As of 17th June, we found the average margin on Premier League and Championship games to be 2.41%
In the Spanish La Lige and La Lige 2, it was slightly better at 2.2%
Across the rest of Europe, when looking at the German Bundesliga, the Italian Serie A and the Portuguese Primeira Liga it was 2.99%.