The all glass is OK, but I much prefer the adjust-a-bowl for adjustability and no fine particles coming through. You can stop particles by using a small stainless steel screen over the glass screen. Or, by using cotton to catch flakes and reclaim for later.
Small whole nugs work well with glass screen, too. No problem until you stir. Then you're dealing with small flakes again. Think the best way to do this might be do small nugs in glass screen stem at low heat. Dump, finger grind, suck up into adjust-a-bowl and kick heat up a bit. Haven't really been motivated to try this myself.
I personally can't tell any difference in flavor between glass & stainless, even with hits from same nug. But, others have said they do. Probably more to do with my slightly less than stellar meds, so if you sort your stash by name YMMV.