checking validity of local BK contractor

hey all, i need to get some gutters/leaders replaced on the back of my home, cap the front of the roof and cap 2 vents on the roof. i had a consultation with AFNA General Construction. saw their banner in front of a house in the area (Crown Heights). has anyone had an experience with them — good or bad? i liked the guy and the price seemed reasonable. i’ve been ripped off before, so obviously i’m cautious. thanks for your help and input.