there is a lot of nit-picking in this thread.
those that defend the evercool are, more than likely, modders themselves, with varying degrees of electronics experience. I fall into this category, which is why I will never purchase a darwin. reason being is that I am in school for electrical engineering, and would take much more enjoyment in designing something myself (I mentioned the variable wattage concept almost 6 months ago in the modders section and caught all kinds of flak from the modding "veterans" for it. In fact, I wanted to implement it in an almost identical way that the darwin creaters are doing it, monitoring resistance and adjusting voltage). There is nothing in the darwin that cannot be recreated by someone with some technical skill and knowledge. Additionally, a built in battery is a turn off for me as well. I love being able to carry a spare. I get 10 hours from a charge, will be getting much better life on my next evercool. The regulator for my touch sensor IC, and the touch sensor IC itself lowered battery life. Previously, I was getting 14+ hours.
The ones defending the darwin may not be into modding, and in that case, it would appeal to them. Additionally, most modders do not have access to a machine shop where they can make a "pretty" PV. Mine all look like hack jobs, but they get the job done on the cheap, so no complaints from me. I'm a function over form kinda guy.
I applaud the efforts of the darwin team, as they are spending the time and resources to make a consumer good. Something that I would have no motivation to do. Way too many headaches for myself, and most modders.
There are benefits to each side. Nothing electrically revolutionary being done with the darwin, nothing wrong with the evercool. To each his own.
I do, however, have in interest in keeping up with how technology is applied to PV's, which is why I enjoy threads such as this.