I've just got one, but only tried it in the garden to date and in fine (!) weather with a light breeze, set up with the bespoke base so used insect repellent. I have added guys front and rear to keep the ridge taut. I think the sides might flap like the proverbial door in a gale.
I'm 6ft and the height seemed ok: it depends to some extent on the pitching and how much ventilation is left around the edges. I reckon it would be difficult to get in and out without getting wet from the condensation and the porch is small for cooking in the wet. Still, it is a fantastically light shelter at 880g which I bought thinking of the Pyrenees HRP next year.
Will post again when I've tried it in the wet when I'll also take a bivvy in case my down bag gets flooded. Also got the Shangri-La 4, and will be using both in the Pyrenees next month.