Over the xmas period, I managed to find somewhere in the UK that stocked Stone beers, so bought one each of the Session IPA, the standard IPA, and the Double IPA. So far I've consumed the Session and that standard IPA's.
The Session IPA, I really liked, plenty of hop flavour and aroma, and thought they nailed the bitterness at the perfect level for my palate.
I tried the standard IPA the next day, expecting great things after the session had gone down so well. Got to say I was disappointed. There was little aroma in comparison, and was a little too bitter for my palate. It reminded me why I'd stopped drinking american IPA's a couple of years ago.
I'm looking forward to trying the double IPA, as having read the brewery blurb on it, it sounds much closer to the session IPA, tastewise. I'll report back with my opinions, once I've drunk it.