If you can find a GX7 or GX80 have a look at one as they have the same evf.
Some people see a rainbow effect whilst panning, I don't see that. What I see is an evf that never really looks sharp and I can't adjust it so that all of the in view data looks sharp. I don't know if this is the evf or some crappy plastic optic that Panasonic put in front of it.
I've never been a fan of this evf and in fact if I think about it or sit and look at it I detest it but the fact is that when I'm out and about I forget that I hate it and just get on and use it and it is despite its crappiness useable.
It isn't great and you do wonder why they couldn't have put a better unit in.
Got used to it now and works well enough for framing purposes, takes a bit of fine adjustment to find its optimum point.
Much improved since I fitted the extended eyecup, really helps to stop any outside light influences.
Get past the mediocre evf and you have a brilliant little camera, really impressed with so many aspects of it and most importantly image quality.
Just last night I was messing with the Bluetooth, you can use it independently of wi-fi to give quick access to a remote shutter release via phone or tablet.
Two main cons for me are evf and battery life, but you can charge whilst transporting it in a bag via a power bank.
Pros are numerous, iq, ease of use,bluetooth, tilting evf (not for me, but others like it) build quality, built in flash and the list goes on
With the current cashback deal you can't go wrong, if you like rangefinder style cameras that is.