I've always used scrim, more by habit than design in truth
A year or two ago I bought a single microfibre cloth, it was the green Unger one, but it was the tiny one, sorry, they are crap, next to useless so far as I'm concerned
Too small for anything other than blowing your nose in
Effective to be sure, but got wet far to quickly.
Now before long Unger and other manufacturers brought out ones the same size as a scrim.
I have (had) been intending to try out the larger ones, but I had gone over to WFP, and the amount of use my scrims got dropped dramatically, so no real inducement to try one out.
Up at the NEC show in Brum I decided to buy a couple of the larger ones from the Unger stand, a fiver each, what the hell, I was flush, so go for it
I have been mightily impressed, a top product, it does in wipe what it would take 3 or 4 with a scrim.
No bits left behind, great on large panes of glass (internal, over computers and so on) and even when damp it they still leave your work smear free.
I'll still use my scrims, but now it will be for mopping up dirty sills and so on, on the glass it will always be the microfibres from now on.
As for which make or type of microfibre?.........well thats another question altogether