I bought the purple XXL one. I like that there are two straps to hold my sewing machine in place. There's lots of space to pack other things besides my sewing machine. There's room for my iron, spray bottle for starch, cutting mat, wool press mat, the extension table for my machine, some longer rotary rulers, to name a few things. I especially like the straps that appear from the two zippered pockets on the outside, so I can strap on extra items to haul inside from the car (bundles of batting or fabric, project boxes, etc.). The only thing I'd like to change would be to be able to lock the wheels. The whole thing will roll around in the car, unless you have it solidly packed to prevent any movement.