Pros
They provide you a letter to apply for a TN visa
Cons
They lie to you in order to accept the job offer and agree with the process. Once you start you find out it's not what they promised. They modify your resume and put it in a market, you have to lie about yourself. Everytime you question about what they're doing they reply with the same: "We have done this for so long, we know what we're doing" "This is the only way to get you in US" "Don't worry, everybody lies". Basically you have to lie about everything you know and everything you are. Besides all that, the payment is really bad compared with the huge profit they're making from you. Don't waste your time with this company, if you want to work in US there are many other companies out there.