Now that taxi drivers are required to accept credit cards in Boston, what have others experienced? I've found the credit card machine almost always works--almost--but the driver often whines and complains. Most recently, I was coming back from the airport, and as soon as I told the driver I wanted to use a credit card, he went off on me. "I don't get the money right away! You'll get the money back--just pay cash! I need to feed my family!" and on and on and on. My reaction was simply too bad, I paid with the credit card. My stuff was in the trunk, and as I got out of the cab, the driver started slowly driving off with my stuff still in the trunk--it seemed pretty clear he was doing this in retribution, and he did stop and open his trunk after I banged on it a couple of times. Yeesh. My other "favorite" part is the cabbies who have programmed default tip options of 20% or 25% on the touch screen. There's no way I'm tipping a cabbie 20% unless he shines my shoes during the ride!

Any other experiences?