is 3G card worth it?

I think it really depends what you are doing online. For me,it was worth it to get one(dongle for usb slot) when for when we go up to see my son and have only the dongle for access as I can easily do a survey every day and they pay well in one way and another. I bought mine and was able to regain the cost in what would have been missed surveys in the first month. Mine is pay as you go and I keep credit on it and then just use it per day if we are at my sons. It isn't really enough capacity for streaming video or music if those are something you would use it for (mine is only 1gb a month) unless you can get a good deal on a tariff. I men the speed is perfectly fine for it but a 1gb allowance runs out fast using it for that application. Skype works flawlessly on it.