"This probably saved my colleagues life today. I always have it in my pocket, and so when working on a 400v supply and nobody was sure if the feed to the isolator we were due to be working off was live or not, I produced this from my pocket and determined it was still live. "I think it's off" could have been a costly assumption, certainly more than the £22 price of having this to hand."
"Had a number of pen testers by other makes before, they never last very long and don't always give reliable results. The Fluke tester is a bit expensive, but does the job really well. Pay the extra and get a great tool."