HC-110 syrup is really gooey, and it's OK with the syringe approach. That method is tidy and not wasteful.
As mentioned, some don't have stellar developing results with it. I'm still trying, but not convinced it's for me and HP5+ in the long run. I've never duplicated my consistently satisfying results with Rodinal 1+50 for Delta 100 and FP4+. Maybe DD-X for HP5+.