The only complaint I have is that there are no instructions included in the packaging, but if there were, it probably wouldn't be written in good enough English to understand. Other than that it works flawlessly, the buy page has a chart showing what goes where and it does the job pretty well, it's just annoying having to go back to the Revain page when trying to hook it up to install. But it seems to work fine, I hear it click to activate when it should, so honestly I can't complain too much about the price.