I dislike Marmite intensely but as far as my VU+ (Solo) goes, even though I like it a lot I can't say I would put it at the top of the pile. I find that I'm swapping between it and my DrHD at the moment. The VU+ has the full EPG and I find it easy enough to use (though annoying sometimes if you forget which coloured button does what). I've stuck at the VIX 2.1 image as it seems to do all I want.
True enough, I haven't explored all the extended features. Perhaps if I had, I'd want to upgrade the image. I don't know why each skin remaps the buttons either, sometimes I think it's just for the sake of doing it because you can. I call this skin and image development the 'Xmas Tree Effect'. You have your tree, and place some ornaments on it, then lights, tinsel, more ornaments, the fairy, spot a few gaps, more ornaments, maybe more lights and when you stand back to admire your work.....you can't see the tree. Maybe that's a bad analogy but I think that some image/skin developers forget that bottom line, it's an stb.....and maybe some end users occasionally want to just errrm.......watch TV?
The latest image on the DrHD is good as well, but it'll never be as flexible as the VU+. But I've developed a soft spot (it's the one on the top of my head!) for the DrHD and in some ways it's superior to the VU+.
Nutella on warm toast.....that I really like!!!