Beware with your reservation!
Book this hotel 2 weeks in advance for 2 rooms. Requested specifically for 2 queen size beds. But, during the check-in time the rooms were not available, and gave us a king size bed instead. I tried to find out the reason why it's not available since I've made 2 weeks in advance a reservation already. But the front desk employees are very rude explaining their situation. They event gave me a hint to "get lost" by saying I am welcome to check out if I am not happy with the king bed rooms. 
I've no problems staying with other DoubleTree hotels. But, only at this Doubletree hotel at Rancho Penasquitos their services is terrible! Next time I won't recommend to friends or stay at this hotel.