In responsive template u really can get sometimes a lost for a few moment as u have to adopt different positions of some things because they are not same as if u looked at same web from desktop computer for example. Anyway I have long experience with joomla where u now can basicly get only responsive templates ( other are unsellable now) I have to say Imm pretty comfortable with responsive templates based on Twitter Bootstrap framework. I tested with many users and even had a poll on that theme. see more over 80 % of people preffered responsive theme against mobile wap versions or html variants of same site - site is a bit different but not that much. Unioversal option seems interesting - depends how u guys take that concept... AM curious ... :-)