My wife and I ate at the Black Rock on our last of 6 nights in St Ives. We had eaten at 6 other 'top' restaurants on the other nights/lunchtimes. Black Rock beat the lot, hands down.
The restaurant is spacious,relaxing and comfortable. Service was charming and the chef introduced himself. And the food was fantastic - starters of crab salad followed by the best and largest rib eye steaks we've had - cooked to perfection. Great puddings and wine - and very reasonable prices.
We wish we'd eaten there several times more. This place is a must.....!