Basement waterproofing systems rely on a sump pump as the final mechanism to get the water out. The sump pump is the heart of the system. If the heart stops for any reason, the system fails. Subsequently, your basement floods, regardless of the monies paid for drying. Remember, if a sump pump is your only means of keeping your basement dry, you should make sure it is reliable.
Despite stories you have heard over the years about folks getting flooded due to a faulty sump pump, today's sump equipment is better than ever and very reliable – that is if you have the right equipment.