Yeah really great, that heal critted me 5k something, but I use
Alchemist Stone, which is an awesome trinket that all raiders ought to use (those of whom are alchemists ofcourse ^^)

For a tankadin Alchemist Stone at SSC or so might not be the best choise as a trinket, but in Kara or so, yeah.

And yup, I agree, Mad Alchemist's potion is greatest ever.