Vector maps can be just as detailed with the added advantage of being scalable. You could have a single file covering a whole country or even a continent rather than millions of tiles, many of them missing. Street names may be more useful (and intelligible!) in Czech Republic (I know, I come from Slovakia originally ), but here in the UK the situation is a bit different. Street names are often obscured and rarely shown other than at the beginning and the end. If you join the street in the middle, you have no idea what the name is. "Turn left" is much more useful than "turn to Oxford Road", even if it sounded like "Oxford Road" and not "Khrookhfd Road".

Please don't get me wrong, I love the product and yes, I have put my money where my mouth is, even though only a small amount for now. It far exceeds any other offering currently available for this platform. But it has a lot of potential it has not quite realized yet.