I bought one of these low-voltage NC testers after owning the Fluke 90-1000V 1AC-A1-II NC tester for a while. It works well and I like the overall design of it, although I really don't use this one as much as the other higher voltage model. I do find that it sometimes comes in handy though for quick voltage checks, without having to undo any wiring connections, when troubleshooting 24V control circuits on HVACR equipment, alarm systems and even some doorbell/chimes that are using 24V transformers rather than 16V. I've found that it can detect the 90V of a ringing POTS line, which was an interesting discovery, but not sure if that will ever be of any use to me. To my eyes, other than the blunt round tip, this tester looks practically identical to Fluke's other higher voltage NC tester, which has led to some confusion when grabbing it out of the tool bag in a hurry. Even though this tester was a little expensive and I generally don't use it every day, I'm still glad to have had it available on several occasions.