Hey SFers..I am planning to get one or two pairs of these slip ons. I would like your input on these..tell me more..i am a US 11.5, wide feets. (a) How is the fit like? shld i size down/up? (b) Your experience wearing them (c) Are they really worth getting them at prices lsited over at their main site..for their quality..? feel free to give other comments/suggestions thks all!