When I was looking into Microseal I read everything I could about the various products, including Scotchguard w/ teflon, Maxim, and Ultraseal. I found an interesting conversation among people who clean and treat carpet for a living (their online forum) below.

Here is a link that might be useful: Discussion about sealants for carpets by people who do the work

thank you, that was very helpful. i'm going to go ahead with my appointment to have it applied and post back if anything out of the ordinary happens.

I can't be any help but I can tell you that a wool Karastan wears like iron. You will love it!