Expensive but amazing quality and one of the few where extensions permit positive locking of sockets to the tool. Essential if working in really tight spaces. Can be used as a ratcheting nut or screwdriver with ease. Supplied bit holder locks to 1/4 hex bits. Which is why something so darn expensive is actually value for money.
Would be nice if they included a 15mm socket for pedal bikes though.
If you're looking for a very good quality compact socket set, you'll not be disappointed. The ratchet in particular is exceptional. The adjustable head angles are a brilliant idea. My only small complaint is that the screwdriver bits can be hard to get out of the box with oily fingers as they are held very snugly by the foam.