It was actually easy to assemble by eyeballing it. Usage is difficult. You just have keep using it. And I have yet to understand how it did not react at all to a big, rusty ball peen hammer. Because it was on the surface?? Anyway I used it to precisely locate my dogs invisible fence. I got it to work well enough to do that fairly well. I also found my water meter, which had been buried under about two inches of dirt. BUT, There is a "disc" function, what does it do? Supposedly discriminate. OK, what and how and when? All in all, I think it works pretty well. But there is a serious hands-on learning curve. If you're looking for Rolexes at the beach, I wouldn't recommend it.Updated review: I watched a couple YouTube videos. Very helpful. I learned how to use disc function. Very helpful. It really doesn't discriminate. It eliminates- but you can't pick and choose. It eliminates less valuable metals one by one. VERY USEFUL for me to find buried copper wire (invisible dog fence). In sum, the product worked well for my purpose. I'd add a star if the instructions were not so minimal/confusing. But YouTube videos served as my instructions. You may find a Rolex. I would recommend the product. Assemble it and go to YouTube. Add smiley face here.