Yep... tasting burnt already after only 30ml or 2 days. The gunking doesn't really have a huge/pronounced visual difference vs freebase; only slightly, but still noticeable. But, the big difference is, the stronger burnt taste after only 30ml or 2 days.
Coincidentally, my very last 60ml bottle with Salts in it is almost done (it'll be done by tonight). Vaped Salts for a little over 5 months now, from August - December 2017. I will finally be back to freebase starting later tonight or first thing tomorrow. Yay!