I have the -wide and the tele- (and a few normal ones too). When I bought my -wide it came with the plate glass insert. I researched online other opinions about using it and after a few rolls with and without sort of agree with the prevailing feeling: it's not really worth the bother of dust and such vs what tiny if even perceivable benefit you might get.
Congrats on such a wonderful camera. For some reason I never really like the -wide perspective using any of my cameras (about 28mm in 35mm film terms) but I somehow click with the -wide in this TLR style in a big way and now love it:
(Some shots from my first few months of owning)