Alright, so I've played with Yuri's version, and it's an entierly different breed of mod.
I found it to be a bit confusing at first, everything is hidden and it makes you think *ugh, now where is that* but once you get the hang of it and know the gui a bit more you can flip through it fairly quickly.
Design overall is pretty simple (the way I like it) most buttons are hidden that you do not use on a regular basis, but they are easy to get to if you need it. GUI is VERY user freindly, most of the settings you will ever need are at your fingertip (litreally) which is fairly nice, although as NSEW pointed out earlier in a PM you better watch the road and not the screen otherwise you'll drive into a ditch... so that becomes somewhat of a downfall, maybe WAY to many options, some things should be kept hidden so users dont fiddle with it and pay attention to the road.
Errors, I did not stumble upon any, but I only played with it for about 10minutes just to see the capabilities. Considering the amount of features the new GUI has, I was expecting more errors, the more features things usually have the higher chance of failure... this is not the case in this instance.
Settings - Just WOW I can't believe how many more features Yuri was able to add, the list under Settings > Navigation have tripled if not more, from the distance of a warning to you getting notified there's railroad tracks coming up; There is maybe a handful of people that will ever need most of these, for the truck drivers, cab drivers, and consultants like myself it really does help... you can be given a warning that there's tracks infront of you so you can plan accordingly.
Yuri, by far very good work! Thanks for sharing! Boris, thanks for assisting the users with any misc help they require.