According to google they are a reputable company. There is a BBB report on google for them and you can read it by entering their name in google for a search. Unfortunately I can't call up the URl for you to read it here
How their rating is has nothing to do with their hiring practices though. If they ask you to be bonded, then that tells them that you are crime free in essence. At least that is the how and why we are bonded here in Ontario if we are working for a company that has to have workers visiting within homes.
Your position there, should you get the job, will that be visiting door to door, so to speak ?