Can not and would not recommend. Before you sign ...

Can not and would not recommend. Before you sign up be aware that many of your weeds will be resistant to their products...which when you think about it is ironic because I am hiring you to get rid of my weeds!! Of course they can offer additional weed control for more $$$$.
Grab grass in particular which is rampant in Ottawa will still be there. Also be aware that if you get their over-seeding service you will be required to water your lawn a couple of times a day to keep them moist. I feel robbed. Very disappointed.