As you can tell from my username, I'm a fan. Design-wise, my EZM2 and 856 are pretty much tied for favorite tool watch in the stable.
But...there have been a lot of issues with the 856. Out of the gate (new) it had a stuck date wheel. Sent it to RGM, fixed. Then the hour hand slipped and was about 30 min behind. Sent it to RGM, fixed. A few months later, same thing recurred. Sent to RGM, fixed (this time, I think they got a replacement hand from Sinn). By this time, I am around the two year mark, and my warranty is expired. Then the rotor breaks loose, and the watch stopped. Sent to RGM, fixed-thankfully under warranty. Just got it back today, and I am psyched.
I am not down on RGM. They have been great, and they do a nice job regulating the watch too. But wow, I seem to be unlucky with my Sinns. (My EZM2 had bezel issues twice, and I don't turn it much because I consider it fragile). I don't care because I am so in love with the EZM2. Nothing else like it. I have no such issues with the outside of my 856: the case and bracelet are tough as nails. And the 856 just really does it for me every time I look at it.
Keep your fingers crossed for me guys!
Is it just me?