My next door neighbour has one of those. Horrible, low efficiency cyclone that clogs up too easilly, awkward to use and it's ridiculously loud.
2100w for an upright is far too much. I've said it before and I'll say it again, higher watts do NOT equal more suction power.
As much as I'm not a huge fan of them, if you want a bagless vacuum, Dyson are the only decent choice. Aside from that, you're best off sticking with a bag.