the only problems we had during the install were the non-stop rocks. we hit rocks everywhere, which is to be expected in the northeast. We also found a sprinkler line the wrong way. we just cut it back from the pond about 2' and left it plugged. time to call mister irrigation in. I really liked the way the day progressed, we were a little short on time at the end of the day because of the rocks and sprinkler, but the pond was "done" when we left. not bad for a 8-9 hour day. I can't wait to do one on my own. commments/questions?