Considering that I am in the market for such a device it is/was important to read and research as much as possible to inform, enlighten and finally help me choose the right device for me. So after reading the many posts on the subject and (really) trying to decide "which DC is best for me" I am no further forward in my quest. Indeed I am more confused now than before I started except in the use and technical aspects of DC's due entirely to the many excellent posts which have opened my eyes to this technology for which I am grateful, however it would seem that the industry is very much fragmented and leaves the potential buyer open to all sorts of issues.
Of course I could be so wrong in my assumptions but one common thread that keeps appearing is that of 'confusion' who makes what, who is the real manufacture, does customer service exist, how reliable are these products ? for example I have very little faith in buying from sellers based half way round the world advertising on auction sites I like many have had some bad experiences with the subsequent problems associated with trying to get issues sorted so am VERY reluctant to trust suppliers who use that 'market stall'
It would seem that many aficionados change their DC's quite often why is this? When I do decide I want something that will be fully functional, reliable, not overheat and/or melt down, produce results that are going to provide clear and unambiguous evidence if needed and above does what it claims to do on the box - time after time after time.