Sleeve-cartridge valves contain a cylinder that controls the flow of water as it's lifted and turned. These systems wear well and are easy to repair because most of the parts are contained in the sleeve itself. In most cases, you simply lift out the old cartridge and drop in a new one. Ceramic-disk valves are the latest in faucet technology. This system is extremely durable - rare leaks are usually linked to the neoprene seals at the water inlets.
Repairs are easy.