HVT-400 8 Band Antenna

I'm a little sceptical about antennas in general and what the manufacturers claim they can do? I needed a (smallish) antenna for DX'ing, something I could attach on the car and set up quickly. This seemed to be the answer, and covered all the bands I wanted to use.
Having installed and put my antenna analyiser to the test I was pretty well amazed at how close nearly all the bands came to within 1:2:1 on the SWR?
6m was a challenge and may need an ATU to tune down, the best I could get was just under the red line at about 2.5. Works well on my Yaesu FT857D, no complaints.