There is the full range of sports to bet on with better than average coverage on Irish focused Gaelic sports and Irish Horse racing. They offer everything you would expect but Horse racing, both UK and Irish, is where they focus, pulling in a lot of independent data available on the site to help with your selections.
There is a large range of bets and markets for each sport but the margin (odds quality) differs from Sport to Sport. For example, at one extreme they have a relatively high Win/Draw/Win over round in UK football markets at 6%, but the match odds in tennis is just over 3.1% on average.
Horse racing odds are where they made their name though, and they are not afraid to lay the favourite against the weight of money. The limits you can bet are initially high but can be cut quickly of you are a winning punter. There is an initial max win amount of £100,000 in a day for UK football which is also relatively low.