If you go down the path of the Atlantis system you get a near bullet proof design that is very unlikely to leak. With the Atlantis you actually remove the floor boards beneath the shower base insert and there is a bit of blocking and fiddling. Once the base is in the rest is quite easy and the instructions are good. Having dealt with a leak disaster elsewhere we decided to dig a bit deeper and go for a system that is almost completely contained and opted for Atlantis on our last reno.