IMHO I think they are worth 1/4 the RRP, sadly I just dislike them.
I had a Play with the Mk1 in Comet when they were closing down, when I leaned it over to see the brushbar and feel the stiffness, it seemed okay, slightly soft though. I then stood it upright and omg all the dirt spilled out because the dust container is so close to the brushbar
They need to sort that out I think, it didn't clean that well but did alright. I ahd a DC35 and it wasn't impressive either. A DC14 with a blocked pre filter probably cleans better and that's saying something!
4 AW at the cleaner head for the Mk1 Gtech Air ram, I wouldn't own one, I imagine they are just a robust cordless sweeper with extra boost in the battery duration
I think they are overrated like the horrible modern machines produced by Vax.