I found prices to be very reasonable. Nightly hotels at 4+ star accommodation rand between $60-$80 USD nightly, typical meal for 2 with drinks was less than $30 USD, and daily activities varied by price, but I would not consider anything to be expensive in the areas I stayed in. (primarily Ubud, and Kuta area) Of course, you can find expensive meals and hotels, and very cheap locations in Bali. Depends on what you are looking for, but I found myself having a ton of fun and very comfortable for relatively low prices.