My first Sinn watch, and very impressed with the finishing and build quality so far. Have only owned the watch for a day, so time will tell as to how reliable its timekeeping is.
I was initially slightly underwhelmed by the size (used to pilot watches being BIG), but I really can't fault it now I've acclimatised. Modest in size, but still has a very good wrist presence. The hands and numerals really jump off the dial, and are ridiculously legible in any light conditions.
You really have to see it in person to appreciate the piece. Very 'tool-y', but with slightly dressy edge (partly due to the smaller size, partly due to the attractive-but-not-flashy satin case finish). Will work on almost any strap, and can be either dressed up or down, so perfect for a one watch collection.
The only slight negative I have so far is the stiff clasp; it's a push/pressure type lock (i.e. no buttons) and so far is quite difficult to open and close (tough fingernails are required are to pry it open). This will hopefully ease up over time.
Overall, an excellent watch for the money, and would highly recommend.