I have one, I love it. Good bits (not saying other manufacturers don't do these things...) :
- 2 lead RCD test. No need to faff around with a neutral connection (common on all Meggers)
- Use the same 2 leads (red and green) for Ze, PEFC, and PSCC (on single phase), on the same setting: I don't bother using the separate "L-L" setting on the dial and plugging in the blue lead to measure PSCC on single phase, I just use the "L-E" setting (on "2Hi") and put the green lead on N
- Quicker, and possibly and more accurate low current Zs than other Meggers, I like the confidence indicator
- 100V IR for when you're fairly confident, but not totally confident, that there's nothing plugged in. Useless for test results, but fantastic for verifying that nothing's plugged in
- I like the long thin pointy probes, for getting in some tight spots
- Bag is great for carrying all my testing bits (jump leads, R2 adapter, lightmates etc), over-shoulder strap means I can carry my toolbox in one hand and my little ladders in the other
- in "3Lo" Zs mode, you can tell it there are Type B RCDs in play (long press on <-> ). Even if there aren't, and it's just a tetchy Type AC RCD (or maybe a lot of inherent leakage current), it's sometimes useful for getting a Zs result without using The Alternative Method (or, when you really, really don't want to trip an RCD!)
Negatives (common to all Meggers, I think):
- It's far too easy to "un-null" your leads when on continuity setting. Pressing either of the test buttons - which is very easy to do, there's one on each side and just knocking one will do it - will remove the saved null setting. A right pain in the **** if you're the other end of a wander lead! So quite often I either turn it off, or just put it on a different setting, if I'm carrying it around on my neck
- Would be nicer if the backlight light stayed on a bit longer
- Usual Megger lead incompatibility with most third party bits and bobs, so I have a couple of cheap Kewtech leads to connecting to wander lead, lightmates, R2 socket etc.