@organicmaps has been HUGELY useful for both planning and while away on holiday. I've downloaded maps of where we were going for offline use, so I can navigate without data or wifi. I've used it to find shops, playparks, restaurants, ice cream, and drinking water. With the bookmark feature I can make lists of useful spots ahead of time. I've filed LOTS of bugs in their issue queue because I'm a nitpicker and a magnet for bugs, but it's because I think it's a fantastic app with huge potential!
@joachim thanks for the feedback and for spreading the word! Our team is motivated and inspired when we hear about users experience ;-)