I hired mine from birthpartner dot com dot au. they were fantastic. They worked out the cheapest $75 incl post and I had it for 5 weeks but you can have it for 8 weeks no extra charge. They send you lots of info etc and the machine Is easy to use. I liked the fact I could put it on burst mode and just leave it go without having to fiddle around with the machine during a contraction. There were also lots of diff levels in the strength so you could gradually work your way up. I think I had it pretty high. Tens machine was amazing during labour. I used it up until transition and it really helped with the pain and kept me home for most of my labour. Can't recommend birth partner more highly, the lady was lovely to deal with and very helpful.