Tried it and bloodwork was not so hot and I didn't feel great. Not terrible...but not my best. The thing I like is you can use this as an elimination diet and then add things back in. I eat way more fruit now. As soon as I started adding in about a pound of fruit a day (dark berries, watermelon, cantaloupe, kiwi, etc. etc.) of various kinds I felt so much better and my bloodwork improved. Also potatoes, and I love veggies.
Doing carnivore was nice because it was a total reset then I added one thing at a time back in. I started with fruit and immediately felt better, then potatoes. I don't really get gastric distress from any food so it was all about overall well being and performance analysis for me.
I've settled on a more moderate approach (which doesn't it always seem in life somewhere in the middle ends up being the best approach...). I keep my carbs around 150-250 a day except for one very high day. Most of my food is lean meat with a general emphasis on beef and steak (probably 60% of my meat intake), eggs, veggies, fruit and potatoes. I missed roasting veggies way too much and the more veggies and fruit I add in, my bloods just get better and better.