We were very happy with VMB's work and highly recommend them.
The prospect of lowering of a basement floor is a complicated enough venture what with site logistics, schedule, underpinning, waterproofing, weeping tile and sanitary drainage, temporary structural supports and more, but I'm a retired architect and this particular project also happened to be my personal home with very specific design requirements - a challenge which they gladly met. We lived in the home through the entire schedule, though we were located in the second-third floor unit. It still added to the complexity of coordinating the work.
Mike, their site manager was always available, responsive, very knowledgeable about the work and always conscious about the schedule. The workers were all hardworking, knew their daily tasks and simply got it done. Happily, VMB was not the type of company to waste everyone's time with 'nickel & diming' arguments. They are as interested in getting the work expeditiously done to your satisfaction as you are in wrapping it up as quickly possible.