I bought the 400psi ninja is December 2005. On the whole I would say it was one of the best portables out there and is ideal for domestic work.
I do a lot of schools, churches etc and cant help but find it lacking somewhat. I dont think its the manufacturers issue as there is only so much power you can draw out of a wall socket for these machines and they have it as powerfull as you can get.
The other issue is with the V2 steam mate portable. great bit of kit but dont plug it into the same ring of sockets as the two required for the machine as the building fuses will trip. Bit of a pain in the ****
I dont want you put you of buying one, far from it, just want you to be aware of the fuller picture.
Cheers
Daz Roberts