So I setup my car dock last night and have a few initial thoughts about it:
1) The overall construction and feel of the dock is good. The materials generally feel solid and likely to be quite resistant to breaking. The one exception might be the bottom piece of the dock where the mini-USB plug is located. That piece of the dock is actually movable and you have to slide it down before placing your phone in dock, then after the phone is snapped into the dock you slide the bottom of the dock back into place so that the mini-USB plug goes into the USB port on the bottom of your phone. The plastic used to build this particular piece of the dock does not feel as sturdy as the rest of the dock and the sliding action of it also seems a *little* flimsy but not terrible. Aside from that the dock overall seems very sturdy.
2) I find it VERY difficult to get the dock to release the phone. The phone really snaps into the dock and once it's in there it does not want to easily come back out. This is actually very unsettling for me because I feel like I'm really having to pry the phone out of the dock and am worried about getting scuff marks/scratches on the phone during the process! I definitely wish they'd made it easier to remove the phone.
3) The dock (and the SGS2 phone) are both big and finding a good spot to place the dock on my windshield, via the suction cup mount, takes some doing.
4) The clamp on the suction cup mount of the dock takes a lot of pressure to snap into place. It doesn't ease down into the locked position as you're applying pressure to it, it just "fights" you until you finally exert enough pressure on it that it gives in and it suddenly snaps down into place. Again, kind of like removing the phone from the dock, this process takes more effort than I wish it did.
We'll see how I feel after I use the dock over more time but I'm feeling kind of 50/50 about it at this point, mostly due to how difficult I find it to get the phone out of the dock.