I bought the cheaper one as I couldn't see any difference between this one and the other one - maybe it's just an older model. I read the instructions and made sure I calibrated it first before using; although it says it's done in the factory it's best to do it anyway to ensure you get an accurate reading. I had a small leak from my dishwasher so I wanted to test the floor to see if it was damp and thankfully it wasn't. I tried it on my walls just to see how it worked and again, thankfully all readings were very low. It has an alarm that will go off if past the dry mark. It's really easy to use and it gives me peace of mind that there are no water issues that could lead to mould and health issues down the road.

Takes a minute to get used to the controls. Little different from my last one. The color display is clean and clear. Haven't needed to push anything beyond 36v at 200watt. But used it to check car lights, fuses bunch of random things. Set it up to do a little electrolysis, used it to create a heating element so I could seal my own garbage bags, used the same element to heat and bend acrylic which was really fun. Ran a Christmas ornament to add lights to it to see what the final watt/amp needed to reach etc. Fun little tool that when you find you need it you will need it more lol.

Product worked as expected. I had a leak from the condo unit above me and the damage appeared minor but i wasn't sure if it was worth contacting insurance. I opened the wall and inspected the small leak and then purchased this device to measure around the leak on the drywall. After using fans to dry the area and measure the drywall over a few days i decided that the issue was very minor and didn't need insurance. This saved me a claim.