FWIW, I put my gas pedal on and it rocks! It's the same height as stock which means it's a bit too low with cool brakes and street driving, but when the brakes get hot in the hills, the brake pedals sinks a bit more. Spacers can be added underneath the pedal; the stock bolts are long enough to deal with it (Mazdaspeed must have have snuck the long bolt spec in - you can also raise the stock pedal cover the same way).
The wider width is much appreciated! The color and texture don't match because he etches them deeper and doesn't polish it down like Mazdaspeed did, but they can be matched if you have the tools and time and care enough. I didn't. Just as well, after a week they were scratched up pretty bad anyway. Super soft alloy but who cares how it looks, it just works!
Bitch to install though. You'll need a small, 7mm box wrench for the back bolt, and a torx driver (forget the #) to change the pedal cover. Removing the stock pedal cover is the easy part. Because of the plastic construction of the pedal itself, each nut will only have one spot where the box wrench fits.
It's already been said, but either taping the wrench or taping your finger to hold the nut in place is essential. Deep sockets or swivels on a ratchet won't work at all. Also, the little crush washers that come off when you take the stock pedal off? Good luck getting those back on. I don't think they're necessary so I just tossed the little guys. Use some threadlock if you're really worried about it.
Oh, and don't forget to take the floor mat out or put a towel over it. Gritty floor mats and this job are tough on the elbows. Something to pad your knees helps too. A third hand and a rubber spine would help as well, if you have them, but patience and 2-3 Advils will work in a pinch.