First - The ones who just memorize the cryptic codes like col-md-6 or whatever from their favourite CSS Framework like Bootstrap or Foundation. And not long before, I too was in this category using Bootstrap's grid all the time. Second - The ones who simplify the grids into simple partitions of the page. Like half of the page or one-third or something like that and process ahead with that. One of the best grid frameworks that is present for this category is Gridism which actually inspired me to create Pills in the first place.