I prefer bumblebee slightly to blueprints. I give the edge to bumblebee only because it gives full size previews of posts. I hate how bluprints only gives you about half of the post. It does seem to flow better though
Blueprints is definitely nice, but I'm still waiting for a client which provides a quicker method of formatting than html tags. I currently just save to drafts and format on my laptop.
I'm happy with blueprints. Out of the ones I've used (all of them) it's easily the best. I just wish there was a way to get asks through the app. That's literally my only complaint.