and boy.. was I ever glad!
Al wiring is safe.. as long as you use only Al rated outlets/switches (which are a lot more expensive than Cu only rated ones). Also, you need to use special connectors if you ever want to add more wire in the future (since new wire is Cu and you can't mix Cu with Al). [careful. Al wire is also very brittle. Snaps very easily]
In fact, in one outlet in our basement, Cu and Al was connected together without the use of the special connector.. and as a result, the Al wire was oxidized and signs of electrical fires were found.