I am happy to go online and retract what I said earlier about the NBN 50 plan.  After some testing and research of my own, I discovered that the actual problem of slower than expected speed was due to a wifi extender.  When connected by wifi to the TPG router, I achieved close to the expected speed of 42MB/s.  As soon as I connected to the wifi extender, the speed reduced by about 2/3.  I went on to discover that wifi extenders are really a scam and not the TPG service.  I'll bet very few people know that one cannot achieve any better than half the speed of the modem you are linked to because the wifi entender has to use at least half its bandwidth to receive signals, and then the balance of bandwidth it uses to transmit.  Therefore, one can never get better than half the speed of the router it is connected to! I have now decided best approach to extend signal from modem in a large house is to hardwire a router.  ... View more