Its a great little set, everything is made & machined perfectly. I really have nothing bad to say about it!
The case is made of a very tough plastic, I was a bit worried about the latch before I bought it, but after nearly 2 years there is no wear at all. all the parts are held tightly by a rubber mould, which is very handy if your prone to losing things (like myself).
The ratchet is very smooth, it is only 20 teeth (I think hazet offers a set with a fine tooth ratchet as well), but since the handle is short it has never been a problem because it only has to move a short distance. I've had the handle covered in grease and coal dust regularly and it cleans easily and doesn't stain.
All the extensions and sockets are perfect, no machining faults or chrome peeling. the sockets have knurling on them which is really useful. The screwdriver bits have a great coating (I have no idea what it is), which grips screws and doesn't slip. I've used them to remove screws with stripped out heads easily, since they grip so well.
I'm really impressed with the set, it has got me out of a lot of trouble when removing/replacing things from tight areas, and working on small parts of plant (like electrical components). I bought it from Jensputzier^^, he had the best price available at the time. Its definately not cheap, and similar sets from other manufacturers (german or other) can be found for a lot less cash, but I really can't fault it.