It was our first time to Bali so I cannot comment on other areas or other hotels but we were very happy with the Pan Pacific experience. The grounds were immaculate; it wasn't too busy meaning that we could enjoy the bars, restaurants and ocean-front Cabanas without crowds of people. The staff were very friendly and helpful. The resort has a beautiful golf course, decent gym, spa and plenty of dining options. I would note that it took us over an hour to get there from the airport so this should be factored into travel plans.
Villa Luku is just beautiful, set in a quiet and peaceful location out of the hustle and bustle of busy Kuta/Seminyak. The staff are amazing, happy to arrange anything you need. The villa it self was lovely, private and very comfortable. Would definitely recommend this for a quiet getaway...but there are lots of steps to go down to the villas so not suited to those who physically can't handle that. My villa Yudistira was the second villa so not too bad.
We loved staying here, the staff made us feel very welcome and were quick to help us out. This is a great place for staying if you want to stay around the villa and relax, there is no need to leave the villa while you are there. If you want to go out you can access a driver through the villa staff.