Although I doubt your 60% figure I understand the intention and reasons for that approach (being mobile device support). Yet I have to stand with what I've posted earlier, I like the general design and style, the colors, the acknex like gesture and other stuff but that one button and it (for PC/ desktop terms) hiding many relevant features... not so much.
"Falls das Resultat nicht einfach nur dermassen gut aussieht, sollten Sie nochmal von vorn anfangen..." - Manual