while i've not yet used shortpixel i find this a no brainer for image optimization plus cdn at a great price. if you already have optimization/cdn covered then i think this would make a great backup plan. all i find is good things about this team. the founder seems on top of it and literally responded to multiple posted questions within minutes. as we all know the team behind it makes all the difference. i'm going ahead and giving 5/5 based on founders promise that our accounts will be upgraded with cname once its rolled out early next year!