They’ve been involved with MusicBrainz for over a decade and know how things work around here.
I’ve experienced them as being an encouraging person and particularly friendly towards beginners. Lending a hand where they can, sharing tips & tricks and tools.
Concerning editing they add many physical releases that are not widespread including high quality scans. (Can’t do much wrong there unless you accidentally pick the wrong files )
Besides that lots of other accepted edits fixing the obvious.
There are only few downvoted edits which I’m not concerned about since most are rather old or not necessary.
I have a great respect for MB’s community and its incredibly committed and talented editors, and it’s nice to know that the feeling is mutual - especially since I’ve probably butted heads (ahem engaged in constructive debate) with about half of you over the years. Long may it continue!