I just recently bought the WeatherTech brand FloorLiner mats for a new
2009 Honda Accord LX Premium sedan.

So far we've been really happy with how well they fit, don't slip, and
keep the carpet underneath looking brand new.

I took some before/after and installation pictures.

Here's the gallery -
http://www.paulstravelpictures.com/WeatherTech-FloorLiner-Review-2009-Honda-Accord-LX

I think they were well worth the ~$159.90 + shipping that I paid for
them. People who drive bare foot might miss the warm feeling of the
OEM carpet mats though.

Cheers,
Paul Michaels
Ft. Lauderdale, FL