The metal connectors are big, but that feels like quality, but the plugs are not bulky off the wall because of the overall angled design (European plugs actually eat up more space off the wall because they are straight although of course europlugs take much less surface area on the wall), which is good behind furnitures or where space is tight. There is only one sort of plug and it has a well designed earth connector. Plugs include a fuse and it's easily replaceable (this is partly due to the standard use of ring circuits in the UK but I find it a nice feature anyway). They have very good grip and stay in place very well (compare this to europlug...). Sockets have an integrated switch.
British plugs are a quiet success (the other one being postcodes).