A very large wood composite deck surface to clean. Broom brush = a bummer, back and arms broken. Next year test Karcher launches with "classic" although it is not recommended. Also bad back and arms because it takes strength to hold the spear near enough slides for an effective result. Very long, very noisy, and jet marks on the blades! I ordered this T-RACER despite being skeptical views youtube videos: I wondered if there was not "faking" it sounds as effective. And today one regret: not having bought before! It is fabulous! Fast, no need to force, no marks on the blades. Noisy but certainly I do not break my back and it's done in record time ... With the current offer of Karcher (refund of 20) this spring chore disappeared for 40 ..