I got calls from a foreign call center for installing Chubb Security Systems products in my home. Their partner which installed the products is Smart4u security.
First of all the prices they offered were extremely competitive with everybody else, I called all the other top rated companies listed here. Nobodies price came even close, Chubb Security was at least %30-40 cheaper than the competition. I got an amazing package however the service lacked professionalism & quality.
The equipment, specifically, the camera systems (fosca) are cheap & can easily be bought from the internet from ebay or other Chinese marketers. The installers also not very professional and not up to date with technology, specifically ip networking.
I did sign a contract however I'm not so sure that camera equipment will even last through the contract. Another issue with this company I had to schedule multiple appointments because the installer kept forgetting the equipment & came in the with the wrong paperwork. The staff are also not very knowledge about the security cameras, a simple google search will yield you more info.
I regret signing the contract as I realized during the service the camera systems are very easy to install nowadays. They are all wireless so the only issue is powering them, which can be done if you are a bit handy with tools. I'm also not even sure the monitoring is effective with this company as they are hard to get in touch with over the phone. Call Chubb Security yourself and you'll get voice mails to all their workers.
ADT may have been more expensive, however there customer service was top notch and professional. I had no problem ever reaching somebody or getting my equipment serviced, 24/7.
I recommend Chubb Security and their vendors only if you cannot afford to pay a better company for better equipment, or you are not capable of installing camera systems yourself and looking for the cheapest rate possible.
Update (few months with there service): Rating is still 0 and would not recommend this company at all. I had a issue with my camera equipment & the technician would not come home my home and wanted to charge me over $100 instead. It is also very hard to get a hold of anyone, so customer service is lacking as well.