I ride 2009 Burton rulers. Its a mid stiff boot. Great for all mountain riding. I love the quick lace system, I hate laces. In terms of comfort I can't really say much as I had to install my own j bars and insoles to fit my foot perfectly. No heel lift or pain. However if I crank my bindings down tight the strap will make a dent into the boot.
I may upgrade to newer rulers or try a different brand. Not many other brands to try on in my area.