Costing a whole lot more (3% of the sale plus ~30 cent fixed vs. ~5 cent), and being a nightmare for merchants because of conflict resolution by default going in favor of the customer.
As it stands it actually cost more to purchase online using bitcoin for me due to the additional coat of getting the bitcoins in the first place. Forget about offline purchase , no vendors here accept crypto-currencies. Accompanied by the the hassle of setting up a new system for bitcoin and it isn't exactly dummie friendly (I'm not tech savvy) ,its current uselessness for very small transaction(especially for ones within the same country) and the lack of buyer protection( I'm mainly a consumer not a merchant) ,I don't see myself using bitcoin any time soon.
That's a valid point. I will add that I think it's not 100% accurate (see my remarks at the end of this post), but in principle, I see what you mean and agree.
Note however that I talked about "transaction costs", which for traditional payment systems are carried by the vendor/merchant. And from their side, it does stand as 3% + 30 cent (Paypal), 2% (Visa, but only if you're big enough) vs. 0 cost (if Bitcoin is used natively and the sender pays the tx fee).
From that I conclude that there is a strong incentive to the
merchant to encourage use of Bitcoin for payments. I think we will see more and more that merchants will offer some benefits to customers paying in BTC (rebate, additional service free of charge, etc.). Basically, sharing some of the 3% they save, to increase the share of their payments coming in through Bitcoin.
As for the costs of acquiring Bitcoins for the consumer: I agree, it's far from ideal currently. However, you
can send money to Bitstamp (free of charge, SEPA), buy coins at market
for a fee of between 0.2% and 0.5%, and withdraw those coins free of charge.
I said "far from ideal" because I realize that for the average consumer, using an exchange is not a "comfortable enough" option yet, with all the verification issues, counterparty risk, etc. I mention it however because it is possible, right now, to buy Bitcoins at market price and pay at most .5% premium on top of the price.