As a hobbyist and someone who has worked retail, the choice of that skimmer would be followed closely by setting my money on fire. Their are many skimmers that are inexpensive that work better, pretty much anything else below $200 will be better if you don't want to buy ours.
This first batch was sent fully assembled but that will be changed, the pumps came loose in many instances and broke pieces inside,now they will be sent with the pump outside and some assembly will be required. I suspect on Aarons skimmer the pump came loose in transit and something is seperated. The predecessor 3110/2 was shipped fully assembled without incident but the pump was lighter and installed differently, in the new skimmer this won't be possible but assembly will be very simple.