Some question regarding in-tank fuel pump replacement

Teacher's Pet wrote:
Good luck, we've paid twice to have them replaced, both times happened on a trip.

When I replaced the one on my Caravan I'd had it replaced twice earlier at a garage, the third time I told them to give me the pump and I'd do it myself. I couldn't find anything wrong with their installation but the new pump I put in worked fine and gave me no more trouble. Third times the charm???