Reviews:
From Myles Kelsey, Bike Network:
https://bikenetwork.co.za/
From Vital MTB podcast with Charlie Sponsel: 
Sponsel: "...I've got a Sprindex adjustable spring."
Host Shawn Spomer: "Dude, does it work?"
Sponsel: "It works great. It's amazing. Honestly, I wouldn't ride a coil if it didn't have that because I think getting stuck in between spring rates is just a really stupid way to make your bike feel bad. If you should be on a 525 but Rockshox only makes a 500 or a 550, which is me, then you're just either always...your bike's just sitting too low like a Barcalounger or it feels like you're getting pitched over the handlebars. So, yeah, I'm pumped on it. It's a great, great product."
Vitalmtb:
https://www.youtube.com/watch?v=bp-P83eH4Iw&t=1s
Pinkbike:
https://www.pinkbike.com/news/sprindex-adjustable-rate-coil-spring-first-look.html
Pinkbike innovation of the year nomination:
https://www.pinkbike.com/news/2019-pinkbike-awards-innovation-of-the-year-nominees.html
Vital MTB:
https://www.vitalmtb.com/news/press-release/Sprindex-Adjustable-Coil-Spring-Rate-on-the-Fly,3252
MTB-News (Germany):
https://www.mtb-news.de/news/
Bike Mag:
Bike Rumor:
Cycling Magazine:
https://cyclingmagazine.ca/mtb/sprindex-introduces-tool-free-adjustable-coil-suspension/
Ruote Pedali (Italy):
https://ruoteapedali.it/2019/12/18/sprindex-semplicemente-geniale-simply-brilliant/
MTB Mag:
https://www.mtb-mag.com/en/sprindex-new-adjustable-coil-spring-system/
Bike Perfect:
https://www.bikeperfect.com/news/sprindexs-adjustable-coil-shocks
Bibtrend:
https://bibtrend.com/sprindex-introduces-adjustable-spring-rate-coils/
MTB-VCO:
https://mtb-vco.com/da-sprindex-un-sistema-per-regolare-al-volo-lammortizzatore-a-molla/
GMBN TECH:
More GMBN Tech (2020 trends):
Vital MTB:
https://www.vitalmtb.com/features/Whats-In-Whats-Out-Mountain-Biking-in-2020,2815
Adventure Muse:
Bike Mag:
Seagull's cycles TV:
https://www.youtube.com/watch?v=-BnqXiMfGEQ&feature=youtu.be