From what I have read, there doesn't seem to be a downside to using a SWG other than initial system cost. Maybe the fact that you need to clean the plates.
I am looking to buy a SWG for under $100, so initial cost isn't really even a downside.
What other downsides are there, if any?
How long on average will it take for the SWG to pay for itself ($100)? I know, lots of variables, but rough guesstimate.