I bought one of the Lidl units either last time round or time before. Competent unit, excellent value for money and not made so cheap as to be pretty much useless except under ideal condtions. A useful addition to the toolbox but not something I'd spend more on.
The USB laptop accessory devices are still of limited resolution so bigger screen isn't that much of an improvement. Lidl and similar devices are easy to hand hold whilst poking snake into place. Laptop ones need somewhere to stand the laptop close enough to see the screen. None of the jobs I've needed to use mine for could have been done with one of the USB devices. Laptop oop t' ladder or under the Rangie. No thanks. That said a high resolution, VGA or greater, USB accessory camera would be very nice for some jobs. But it needs to be high resolution.
In my view there isn't, in practice, a great deal of overlap in the areas where the two types of device work at least well enough.
Clive
Edited By Clive Foster on 24/02/2014 13:04:31