It really all depends on where your team is playing and which feed you're watching. Some teams are great, some are terrible. Syracuse's feed looks like the game is filmed with a flip phone, meanwhile some teams have very good cameras. Most teams have a scoreboard and clock/PP time, some (somehow) still don't. Some teams show crowd shots way too much (overlapping actual gameplay) and some keep it the way it should be.
You said you have some experience with watching some Belleville games last year, and I would put them about middle of the pack in terms of overall quality. Personally, I can't commit to a whole package, but I'll watch select games here and there, because the production in Binghamton is usually pretty good, and they're my team.
Like tigervixxxen said, they're watchable at the very least, and every other way to watch the AHL has gone out the window. You used to be able to find some sketchy streams online if you looked hard enough, but those sites are all gone now.