For me, it is reliable. It is important that you can easily dispose of the liquid after taking the temperature, which is very useful for someone with a high fever where their joints "boil". The price is very good.

I ordered two. I received them on time. I tried both of them but I didn't see any visible indication anywhere, even though I tried from different angles and lighting conditions. I know, it's a cheap product, but it's a shame for someone else to fall for it. They went straight to the trash bin...