I was looking to buy this some time ago but it was $399 from all stores, David Jones, shaver shop etc. couldnt justify the price and ended up buying something different from Ali express which was not nearly as good as this one. Eventually gave it to family as it was very mediocre.
This one I tested briefly in store and the difference is huge. You can tell just by viewing it in action the way the massage points move vs the cheaper alternatives. It gives a much deeper massage with better coverage and stronger stall force.
Now this is $250 less which is crazy good, might just have to buy a few more..
If you aren't keen on dropping that much, the Renpho that gets posted here a bit is awesome, and you can position it all over your back, legs, arms (I even hold it against my head). Comes on sale every now & then, it's really good!