Do not go near them.

The Weatherseal sales guy (good cop) who visits your house will be delightful but unable to really do much without speaking to his "boss" (bad cop). They will more than half the initial quote making you think that you've got a great deal. They will tell you their quality is the same as Everest and make some connection to the big boss which doesn't actually make any sense! They will be unable to fully explain the finance options because they are really so bad you wouldn't want to touch them unless you can pay back very quickly. They will then keep contacting you to tell you that you are one of only 5 or 6 people a year they will offer trade prices to and expect you to go through the whole thing again with that department. Again making you think you have a great deal. Both of you must be there from the start which exemplifies how dubious it is in the first place. My best advice is never to let a Weatherseal employee enter your home and certainly not do business with them.