If it can help, I just processed 4 rolls of 120 Astia slide film trough 500ml of solution. I extend the 1st developer of 30 sec. and the bleach from 6 to 10 minutes.
The results are really good.
Not bad, as it gives you about 40 rolls per kit!
Once you get used in maintaining the right temp, it gets as easy as processing b&w, just a tad longer. Now that I used more than half the capacity of my first chemistry kit I can't believe I waited so long before processing my own color.