Went to Hardrock in our previous trip. Took a taxi from FWH taxi stand (in front of Starbucks). Prices were RM$30 and RM$60 for a normal and 6/7 seaters respectively. Journey is not smooth. Road was uneven. Quite ulu too. Yes, as mentioned by deepblue, the journey took us approx 10 mins or less. We called for another taxi back to the hotel (via the FWH taxi stand) when we were done too.
* As mentioned in my previous post, do note that Hardrock had already cancelled their Fridays to Sundays Breakfast Buffet.