Brothers has a pita bread pizza which I find to be the most amazing, crunchy, delicious pizza in town. You've got to get it with barbecue or buffalo chicken as a topping. They only come in one size so if you're with a buddy, definitely get two (one of each). I used to work right nearby so I ate them quite often.
Their Buffalo chicken salad is also quite delectable and all the guys who work there that I've encountered have been awesome.
Best pizza in Andover !