Genuine AEST YHDB540 Bike Bicycle Hydraulic Disc Brake - Black (Front + Rear)

Pros: Brakes look nice...
The adjustability seems very good, as you have 2 adjustment possible on the levers. The levers look well machined.
No leaking, and I can use these out of the box without needed bleeding.

Cons: CAME WITH NO DOCUMENTS OR DIRECTIONS...
Came with non standard screws. A star 8 pattern, instead of the standard allen wrench type (Octagon) found universally on bikes.
Came with no tools, so you need to have a star wrench ready. (The same standard size for screwing the disc onto your wheel.)
Missing the front brake adaptor. You'd think they would insure all parts are present before shipping off a HALF DEFECTIVE brake set.
The brake units seemed to have some misaligned machining around the outside of the unit. It doesn't seem to affect performance. The levers look well machined though.

Other: They look great, standard installation process.
Loads of adjustability with the "feel" of the brakes from the lever (2 adjustment screws).
I think my old Juicy 5s are better though, but they also cost almost double.
For a 2nd city bike or weekend trail rider, these are a good buy.