Full-Tower PC cases are significantly superior to every other form-factor PC case in terms of component support. Full towers are generally larger, heavier, and require more desk space than ITX, M-ATX, or ATX/Mid-towers, and they offer far better upgradeability than these towers. Although the best mid-tower cases have significantly improved in the last few years and are more popular than any other form factor, they often come with a few disadvantages that may be deal-breakers for enthusiast PC builders.