i have had several pairs of these boots over the last 4 years, all desert (5'7", 135).  they are extremely comfortable, like a tennis shoe, very flexible, breathable, lightweight.  however, if you are going to be doing much of anything beyond a couple hours in the field with a light to moderate pack, i couldn't recommend these.  there just isn't much support, anywhere.  the ankle and the 'shank' are the most obvious areas where the lack of support is apparent.  also, several of my mates have had the stitching fail around the forefoot of these boots.  but for light work, i haven't worn a boot yet that is more comfortable.