Entrance is free, but you still need to get a ticket from a ticket office just outside of the museum. They just hand out the free tickets to foreigners but if your Chinese expect to show your ID to get your ticket.
Lots of different exhibits. There's a tea shop on the 2nd floor, which sells some snacks.
There's also nice big park next to the museum that is nice to walk around. Its huge - so you can also take the 5RMB electric cart around the park and find a place to get off to relax.
This museum is one of the best in Chengdu. Reminiscent of the Shanghai Museum in content and layout, it gives a good overview of the region's history and traditional culture by way of thousands upon thousands of amazingly intact artifacts, some of which are thousands of years old. Upper floors feature artifacts used by some of the province's minority ethnic groups, including Tibetans, Yi, Qiang, and Hui. Well worth a visit whether you live here or are traveling through.