I used the Excel for 3 yease from new with no problems, other than changing a vac motor and rebuilding the end of the water pump.
Some people may think they look a bit old fashioned and made from glassfibre, but if it doe's the job, you can't ask for much else. I used to run mine with the heater on as well with no problems. i still have it as a back up machine, the back wheels are starting to bend a bit inwards, but can still move about.
If i was buying another brand new portable, with it's twin vacs, and able to run a scrubber, this is the one for me.
Dave