I'm with you mbasko,
After at least 20 hours with the QED I am confident in saying that it is NOT an SDC slayer, and doesn't have the ease of use or performance of a 4500 / 5000.
They are not for everyone, as they are not all that user friendly ! Anyone who has never used a manual GB detector will probably stuggle with it.
A bit fiddly is how I would summarise the QED.
The trouble with fixed ground balance is that you can compensate for the noisy ground, then walk onto an area that is quieter without realising it, because the machines GB is " over compensating " for the noisy stuff. By over compensating, you will lose depth and sensitivity. Bit like running a 4500 in " smooth " over noisy ground, then leaving it in smooth when you walk accross quieter ground, without switching back to " enhance " or " normal ". :N: Although the QED has a digital readout of the GB number, it doesn't change as you walk, it stays fixed at whatever the initial GB was. If Howard could get that number to " track ", for want of a better word, that would be very helpful !
IMHO, it's only advantage is price and weight. Having said that, it's not a bad detector for the money, and Howard is working on improving it all the time. He has already addressed one of my initial gripes, re the exposed ribbon cable. :Y:
The QED, as a fixed GB, single channel detector, is always going to have limitations, but it will have it's place, such as raw prospecting in lesser known areas, particularly WA ( as long as it can handle the atrocious salt and iron rich ground ).
Rick