That's awesome. It's going to my next weekend project =) Maybe I'm thinking too much...I'd suggest to check on the soundproofing material from time to time. The mat will slide/shift a little and eventually rub off the sound deadening material. Once the sticky part is exposed, it may stain your carpet.
Honda cheaped out on fender well liners versus previous generations. They used a thinner plastic which in my opinion helps to echo road noise. I'd put some strips of that neoprene matting on the back of the fenders well liners to dampen the road noise echoed through these.
Not sure what you paid for that Amazon stuff, but Window Wrap at a home improvement store is the same material.