I use the Henry for doing the car or any other dirty jobs. There are times when I cant be bothered to get the mains powered vacs out for small spillages , and love to just lift off the dustbuster from its charging pad, and the job's done in seconds. The DC34 is also great for this, and many people are now looking at the DC35 as a main vac as its got a long tube and rotating floorhead, especially those who want a very light and convenient vac.
There are many of these type of stick vacs now available and they are getting quite in vogue - like the Ergo-rapido, and other hand vacs built onto a stick with a floorhead on the end. They are not my cup of tea, as the suction is only as good as the hand vac can produce, and many of them use a direct filter which clogs quickly.
The G-Tech Air Ram is a very popular battery vac at present, but its only good for floors, as its just an electric sweeper, but the DC44 can do above floor cleaning as well as carpets, so its more versatile - I want one, yes of course I do, but again, its the cost. Air-Rams are not worth £200, and nor are the Dyson DC44 Handhelds worth the £270 price tag. When I see one going for a song I will get one, but until then, I cant justify the price.