Well I like the guide but then I've never really tried to load the reels without one, except in daylight and found it difficult with the lights on. But I've never scratched a film with the loading guide. I still like the Jobo design plastic reels.
For years I had no problems with the 2509n but of late have some unevenennes I am trying to get sorted out. That's a different issue from loading problems, though.