Been wanting to buy this for ages. Product reviews are pretty good. Slightly more expensive (93c) than Amazon if you have a Prime account but hey easier to return at Bunnings (i'm always going there for some reason or other).
Tested it myself after getting it and it's way better than the 2 cheap stud finders I used to have. Also runs on cheap AA batteries, cheapy finders use expensive 9V ones.
Have this exact stud finder..
Best one I've ever owned and used.. Super easy to read