Coming up thru Bawstin, if you're on 95, unless you have a burning desire to drive thru the city, best bet is to stay on 95 which loops around the city.
If time is an issue, pick up 84 in CT to 90E to 290N to 495N where it joins 95 nawth again up near the NH border. A bit shorter and you avoid city traffic.
If you have time, you can stop by The Old North Bridge in Concord (Shot heard round the world) and other historic sites. Of course, you're near our store then so stop by and have coffee on me.
BTW, Charleston is a sister city of Boston. Has a similar charm to it. Apparently lot's of folks from Boston vaca'd down there in the past.
Have fun crusin in the bolt!