My beloved Sencore Cricket went belly-up a few months ago, so I went shopping for something to replace it. This Peak tester is as foolproof as they come. Automatic lead ID, checks out bipolars, FET's, MOSFET's, diodes, triacs, LED's, and more. Awesome little gadget. Only thing I've found that it fails with are power VFET's, as the low S-D resistance looks like a short to the meter. Other than that, this thing is awesome.