We recently used aussiespect.com.au They were pretty flat out, I made a request on the Mon-Tues. They organised an inspection with the Agent for that Friday. Had the building report on Monday and the Pest on Wednesday.
Overall they were good as far as visual inspections go and made some good recommendations, but in the end mainly confirmed our own judgments.
In hindsight wasn't really necessary as we had made a decision before the report came back. Although it might have given us a slight advantage in negotiation, as we were ready to hold out and wait for building inspection as a bargaining tool.