Simply stunning temple with superb views. the roads leading there from Siem Reap or Tbang Meanchey are excellent.
We loved it, the buildings are beautiful, though not as grand as most in Siem Reap, but the views are some of the best in Cambodia. It is now possible to drive to the top without any probs, or go in the back of a pick up, leaving only a gentle short walk (about 300m) to the temple base and then a easy walk up through the temples to the top.
The many Khmer army and police stationed there are very friendly and rightfully proud of their job looking after one of Cambodia's treasures.
Entrance is free, but you need to get a ticket at the bottom for which a passport or ID is required. Donations are appreciated.