They look great to me, but it is hard, at least for me, to judge anything by looking at photos. My main signs on the Sativa's is an obvious slowdown of newer growth, and a slight color change on the leaves on the buds. The leaves usually start to lose chlorophyll, which is what gives some strains their purple traits. Once these leaves start to look "different" and things sort of feel greasy. Its hard to describe, but the largest buds feel cool, greasy, and hefty. These are some of the general signs that I rely upon.
Some people don't like to let the plants go as far as losing some of their color, which is fine as well. The difference between the two is about a week. FWIW, the info I spoke of is primarily regarding Sativa or Sativa dominant hybrids. Indica is a little different from my experience. They don't always change colors as much, in which case I look at the ends of the larger buds/colas. When finished, they seem like they start to get skinnier and the leaves can get distorted on bud tips. There is also the trichome amber/cloudy method, which might be better for Indica strains.
