Thanks for posting this the other day. I am almost done with my True Protein WMS custom-mix and liked the reviews I read on Karbolyn after seeing your post.
In fact, Professional Supplements has a new "during workout" mix that just came out called Hyperbolic 10. Looks like a combination of Xtend, Kre-Alkalyn, Karbolyn and some other popular products.
So, I went ahead and ordered both products and should have them next week. Using SuperPump250 for pre-workout, will be using Hyperbolic 10 during workout, and Karbolyn for post-workout. I'll be curious to see how these products work together and I'll let everyone know. The only thing I'm planning to add to the Karbolyn is Kre-Alkalyn and BCAA's for post-workout.
The True Protein custom mix was pretty good, but I'm always searching for better....