Way overpriced for what they are imo. Tiny little 1600w vacs with a standard 38mm inlet. There's a few lads on the "gutter cleaning uk group" on fb who have upgraded them with a 51mm side inlet and 50mm hose and poles to get more airflow and suction.
Gutter vacuum systems ltd will give you a better machine and it'll probably cost less too. They have a new smaller vac called the panther being released soon. No specs yet but knowng GVS it'll be much better than the atom.