It will only be as good as the liquidity it gets...and the commissions need to be close to what they are in the UK for it to have a chance.
They just ran a hurdle race at some track called Market Rasen a few minutes ago. The race had a small field, and the purse was only $8,000 ...
Still, there was good liquidity in the market. Almost a million dollars matched on the win end. Fair prices to be found on both sides.
Some 2/1 shot that won at Turf Paradise yesterday, you could have taken over $7,000 US on him, and all at better than 3/1 odds. If you bet 7k in the win pool, that 2/1 shot would go off 1/9 at Turf Paradise.