Find another store . They carry low end goods , and if you have a problem you will end up havint to take them to court .
First time in 40 years i heard of a insurance co sending the cpt out .

I'm not a big fan of HD for installed products and would like you to go to a local dealer. Organic may not like HD but they buy carpet from the big three mills like any other store. The stuff they have in stock in pretty low end but these are special order products so not to worry. Don't get all caught up in the 'specs'. What is important is the construction, tight twist, (frieze style?) and do you like it? I saw some Mohawk PET samples yesterday and it came with a 7 yr appearance retention warranty. Do these have that? as its usually a good indicator of good construction that will avoid matting and crushing.

I did start out at a local Mohawk dealer and ran into some problems. Very friendly, but not very helpful. And they keep trying to sell me nylon even though it's a little out of my price range.
The Santiago Bay one at HD has a 15/7/7 warranty (so I think that's what you mentioned) with a 10 yr warranty against buckling since it's the Opti Backing. I really like the feel and look of it.
To my untrained eye, it seems constructed well.
I believe the 5.0x4.8 twist is tight, correct?