Henry vacs are pretty common here in the UK, I personally wouldn't consider them that great, they only really sell well cos of the cute face and the name. The current models share similar Ametek motors to the late Compacts and Tristars (up to I think the DXL where they swapped for a cheaper less powerful motor), so do have a bit more oomph than they used to, but they are predominately just straight-suction machines.
There is the Henry Hound model which comes with a pretty basic PN, made I think by WesselWerk, better than straight suction, but I don't think it'd be on par with most american machines...
They also have other models in the Numatic lineup, such as the Hetty (same as Henry, but pink and girly), George, James, Charles, and looking at their website, they also have "Harry" too, so, they do get about!!!
There's also their lineup of professional and commercial machines which often look like they stuck a henry motor onto an oil drum, so they have quite a collection of vacuum cleaners...
And no, I don't own one myself (well, except one of their little desktop toy ones), though my Tristar CXL does have a motor that was made for a Henry in it...
http://numatic.co.uk/