I've read back through other board messages on the clipper card and almost all say that it isn't worth it for tourists. It looks really good to me so I am confused and wondering if I am missing something. I'll only be in SF for 48 hours and the 3 day muni (which I could only use for 2 days) does not look like a good deal at $33. I plan to ride return BART from the airport, maybe one or two rides on cable cars, ferry back from Sausolito and probably a few buses/streetcars here and there. Wouldn't a clipper be great for this? Would save me having to fumble around with cash for buses etc and even in 2 days it looks like I would make back the $3 cost of the card in discounted fares. Even if I ended up out of pocket a little I'd still prefer it really as hate having to have correct fare for every ride and especially in a currency you aren't used to. Am I missing something? If I arrive at SFO at 8pm will I be able to buy a clipper or will the booth be closed? Thanks for your advice.