I received this kit in a reasonable timeframe, and was anxious to use it on the multitude of watches in my drawer that had dead batteries.
Please read the other reviews carefully, as the concerns pointed out by others are all valid. The carrying case is flimsy plastic, the tools are not high quality, and there were no instructions or even materials to identify what some of the tools are for or how to use them. Yes, I did watch the suggested YouTube video, but I still don't know what at least one of the tools is for. The package did include a slip of paper directing me to a website that would provide instructions, so I went to that also. Again, the insructions were not specific to the tools in this kit and (you guessed it) I still don't know what to do with all of the tools as they are not all mentioned/covered on the instruction website (what the heck do you do with the blue rectangular thing with the adjustable pincers?).
After receiving all the instructions that were available, I decided to dive in and change my first battery. I tried the case-prying tool (red with a spoon-bill like protrusion that's honed to a very fine edge) and it would not open the watch case (even though this particular watch does have a little groove to stick the tool in). I was applying only moderate pressure (I'm a female) and the case wasn't opening at all, and I could see that the tip of the tool was bending and would likely break if I exerted more pressure. I stopped before breaking the tool, but now the edge of it is marred. I then picked up the bench knife (wooden handle with a little sharp knife-edge sticking out) and tried that. No luck. Then I went to the little flat-head screwdriver, thinking that it might work. You guessed it--that watch still isn't open. I gave up after that as it was so frustrating. I do plan to try again with some of the other watches, but I'm not overly optimistic at this point.
These are not Seikos or Rolexes--they're $20 department store fashion watches, and I despair that I pretty much wasted my $, at least for the intended purpose. The tools in the kit may be useful around the house for other applications, so I'll consider that my consolation.
I knew after reading various reviews that I was taking a chance, and I was willing to risk the sixteen bucks or so, but I'm still disappointed that it didn't work out as I had hoped.
I was torn between giving it 2 stars or 3 stars, and decided that although they don't claim that these are precision Swiss tools, they do call themselves a watch battery replacement kit, and I was not able to replace my watch battery. Caveat emptor.