i dont like how it transitions from the bubble chamber to the collection cup neck. the cone is nice, but the cup once in place creates a "step" before it can bubble up.
its become finicky with how it skims. i do periodically disassemble the pump to clean it, and still sometimes its wet, some times its dry, in terms of skimmate. ive looked at my skimmer before ive left the house to look around the lfs noting that my cup is half full only to come back an hour later and its overflowing, spilling back into the sump.
this was an ebay special and im hoping that a quality skimmer with a positive reputation will be better than what i have.