the Opera dev's comment that @hr-hristov posted here actually made me register in the forum and also share my opinion. I also find the new way Opera downloads/saves files really annoying. I can't see why it should be such a pain for the developers to add a file dialog as in Opera up to v12. The argument about enormous amounts of storage space available is not valid at all, because here doesn't matter storage space, but rather usability. Many times I just find a file I want to open directly and I don't care at all to which location on my hard drive it downloads (so the temporary folder is perfectly OK for me) - usually this file is some document I want to read once and then forget about it, so there's no reason to download it to some specific folder where it would only make mess. And when I have to choose the download folder, it is time consuming and doesn't have any advantage.
So, please, Opera developers, do something about it (and many many other features which make Opera >12 hardly usable). I can understand that reimplementing the old features is time consuming since the old versions were very feature-rich (which is, I think, the reason why many people prefered Opera to the other browsers), but I can't understand a decision (if I got it well) to not implement it at all. This attitude just sounds like "we know better than you what's good for you", which would be really worth reconsidering, to say the least. I would even pay some reasonable price for the new versions of Opera if it got to the original state as it used to be (with the same UI and features but with different engine) because I loved the old one and the new versions are pretty unusable for me and as you can see, I'm not the only one at all.