I have the older version of this karcher.
I've had it for at least 6 years, and I don't use it much.
When I first got it I used it a bit and it is very good at doing certain jobs. Cleans tiles and glass (esp good on the shower screen) wonderfully with the squeegie, and the bare nozzle is great on grout. Cleaned the oven really well too, and again shooting steam with the bare nozzle strips the grease and burnt on bits, it is great they just disolve!
I also used to use it to steam my curtains, sofa and the odd suit jacket. I was a smoker (pre DD) and it was great for freshening up the house.
I stopped using it when I moved to this house, mainly because I put it in an a hard to get to corner and couldn't be bother to dig it out, then kind of forgot about it!
Have used it too steam my mattresses twice every month to kill dust mites 
To be honest now I'm sitting here thinking about what it does I think I will dig it out and give the kitchen a good spring clean.
I don't rate it for cleaning floors, I also have a steam mop that I don't use, and you have to re fill it quite often then wait a few mins for it to warm up (however the newer models may be faster now)
Also it drips a bit, again that may have been improved in the newer models.
If you do get one I would advise the ones with all of the attachments so as to get most use out of it.