I have a 2016.5 base model SS because I wanted it in black. I knew I was going to do my own stereo and get custom wheels any way so the savings helped pay for what I wanted. After doing all my cosmetic custom work (performance starts next year) I thought that the plastic oem seats looked ugly. If it came with the seats that they come with now I probably would have kept them. The original seats were not uncomfortable IMO but the material used was ugly.
I am 6' 5" 200lbs with a 36" waist. Braum says that the seats will comfortably fit a man with up to a 38" waist. I love the way the side bolsters feel on keeping you planted. It makes you want to take those turns more aggressively LOL. Suspension is definitely my next mod. The seats when coupled with the " Planted Seat Bracket " sit about an inch higher than the originals. That actually worked out better for me because I like to look over my windshield. I have a 13" Madstad, because of my height, and the top was right at my eye view.
Another thing I like are that the seats recline. Now I can move the seat forward one or two clicks and recline back to get a more comfortable position for those long cruise type rides.
The only con that I have stems from me being so tall. The top of my shoulders rest against the bottom of the plastic holes for the seat belts/harness. I am sure this wouldn't effect 99% of drivers.
Not a con but the seats definitely are not waterproof. I knew that they couldn't be with all the stitching. I drove the SS to work last night and right before leaving to come home a small cell came though that dumped buckets for about 10 mins. I wiped the seats off with a towel and still had a wet ass when I got home. Now the seats come shipped in some nice plastic bags. I am going to cut the back side of them so that they fit over the seats with the seat belts, maybe add some Velcro to seam it back together, and keep them in my cubby hole.
With all this said I think that the seats are night and day different. They are made of high quality material, the bolsters keep you planted, and one can recline for more comfort. I highly recommend them.