That Fabspeed exhaust looks clean, simple, and sporty. I can't imagine they got it wrong. It's not like Fabspeed makes Honda Civic parts and this their first highline car. It's not as reputable as AWE, but they have made a name for themselves. I have had several tuned and modified cars. From mild tunes to All out builds. Exhaust only comes down to a few things:
1- Do you like the sound
2- Does it create any additional power
3- Does it look good to your taste
4- has to be a reputable brand to make sure the exhaust isn't holding the engine back from making power, but hopefully opening it up to allow it to make additional power.
I won't be getting an exhaust for my future 718 (simply because it's a lease), but I would like to get the duel tips, wheel spacers, aftermarket springs, and an ECU tune. All or most of those parts would be sold probably here when the car would be ready to go back.
I wouldn't worry too much about buying Fabspeed. I would just find some soundsclips online to see if you like the sound.
Now as far as customer service, I have no idea... Based on what nineball said, I would look to read reviews online about Fabspeed before placing the order. My opinion, what nineball said would be my only concern...