I just built my 2 LEs I bought. Only issue I had was bending the pins on one of the 14 pin sockets and not noticing until I had soldered 4 of the pins. Then ended up breaking it in half trying to get it back out to fix the pins. Made a quick trip to Radio Shack to pick up another one and finished that.
Then today I built one of my smart string hubs. Put in the 8 pin headers, then one wasn't in just right and once I got the header out, couldn't get all the solder out of the hole to get it back in. So in the process I ended up have the pad lift up on the top of the board. So that hub can't use Universe 4. At least it wasn't something critical. I can live with that. I had been careful with it, and only soldered one pin to check it after learning to slow down with the other stuff.