The Just Jap seats have fairly cheap cloth covering - it won't last too long. Any fixed back seat will wear quickly in a daily driver on the side bolster. Most fixed back seats will touch the seat belt post with the side wings too - another wear point. I have had 5 different seats in my car
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1. original (dealer option) leather NB8B seats (too slippery and heavily padded for my liking)
2. OBX Forza fixed back ($249 off ebay) easy to fit on driver's side, very comfortable and gained extra room, but quickly wore through the side bolster (8 weeks!). I still have this seat and intend to get it recovered with more durable material and use it for track days.
3. Cobra Monaco S seats (from Revolution and now in Mxhevn's car) much harder to fit and are angled back more so I couldn't get full travel on the rails without hitting the roll bar. Not as comfortable as the OBX for me (but I'm a Big Dog and they definitely work for Mxhevn who is a smaller build).
4. Well worn NB8B cloth seats and finally...
5. Pristine 30000km NB8B cloth seats.
The well worn ones were the most comfortable of all the NB seats I have had as they had 'sagged' enough so that you sit into the seat rather than on it.
So... don't be fooled by leather seats - they are painfully slippery when driving hard - you end up using the steering wheel to keep yourself still. And no, I don't recommend fixed back seats in a daily driver (I did 20000km with mine) as you will find it painful to get in and out when the roof is up - I sometimes put the roof down in the rain rather than go through the contortions
Above all sit in the seat before you buy it and measure carefully to make sure it will fit.... lots of seats look like they should fit but won't.