Used it and it worked.
There are plenty of testers available and on the market but I really like the design of this one It's not too obtrusive and the size is right such that it is easy to see.
The GFCI tester is icing on the cake, so to say, because it makes it easy to test the GFCI tripping ability which is important for those that want to ensure that the GFCI part of the outlet circuit is functional and working.If you are going to purchase only one tester then make the most of your money and purchase one that test GFCI circuitry as well.
I already had an outlet tester, but the price on this on was slashed and the quality is much better.
Because of that, I have to wonder about the quality and safety of the product.
"I'm pretty sure this means you shouldn't try to force it into a non fitting plug and you can only verify GFCI by pressing the test button, but I'd like to be able to confirm that.
I got this during a lightning deal for $5 since it was so cheap and I thought it'd be a good idea to have just in case.
But immediately after using this, in one of my apartments, it tripped my GFCI outlet and blew a fuse and after blowing 2 lights I dare not keep it.
Oh and the bizarre part is that the indicator on the tester showed as though the outlet was fine so I've no idea how or why it tripped/blew out but I'm planning on returning it.