Having never bought seatcovers in my 38 years of driving...I ended up buying Wet Okole for my KC and am pleased with the fit & appearance.
Two things sealed the deal for me:
1) In my research I found I could order a manually inflatable lumbar support (+$29/seatcover)...something I knew I'd appreciate in my SV.
2) I found a cool (to me) carbon fiber pattern which one-upped the typical 2-tone that are widely available.
I also opted for several additional pockets that I may or may not ever use.
I went w/ Neoprene due to its durability. Neoprene has several folks saying they can be warm in the Summer. This is still a semi-concern on my end since I installed them in the Fall '16. Worth noting that Neospreme is not Neoprene.
~$350 = front KC seats + headrest covers + (1) manually adjustable lumbar support + assorted pockets + shipping
Yeah, a bit pricey. Fairly easy install w/ supplied instructions and online videos.
Scroll down to see the available patterns:
Nissan Frontier Pattern Seat Covers - Wet Okole Hawaii
Here is link to their manual lumbar support:
Seat Cover Lumbar Pumps for Back Support - Wet Okole Hawaii
This inflatable bladder required a bit of finagling to get it into the right spot for comfort's sake.