Being over 6 feet tall and 'blessed' with broad shoulders, finding a comfortable sleeping bag has been something of a task. This product lives up to it's claims, allowing an impressive level of freedom of movement. I really cannot praise the space and comfort of this product enough. If like myself you struggle to fit into 'normal' bags, or find the shape of mummy bags too restrictive or claustraphobic this is a good investment. The built-in compression bag is a nice innovation, but be advised, even with the straps tightened as much as possible, this bag is still a little bulky when rolled up.
As for the warmth, it really is just on the cusp of being a decent 2 season bag, if you want a warmer bag with the same freedom of movement, I recomend the Gelert Beyond range (unfortuntely not available via amazon, but easily available elsewhere online) EDIT: It apears that Gelert's Beyond range is now as rare as hen's teeth, so don't hold your breath.