I liked that it came with all of the parts, even the specific drill bits.  The instructions were clear and the installation was very easy once you read through everything and measure exactly where the hole needs to be drilled in the downspout.  I also used it as a planter and the flowers I planted are still healthy after a month.  Some water still comes through the downspout but most of it definitely goes into the barrel.  I think because I have a larger downspout, the diverter doesn't catch everything but it's now certainly better than it was without it.  I use the water in the barrel to water other flower pots around the house or just drain it with a hose.