We have one with very similar language but more of a deep dive which includes explanations and scenarios of covered vs. non covered. And obviously we include detailed information on how to initiate a Maintenace request, how we monitor plus what I'll just simply call our competitive edge with our contracts and how we arrive at the cost.
Since inception 2 years ago, Most have purchased them and those that haven't wished they did. For those that didn't it wasn't because they didn't think they needed it, it was because of some higher up finance person who simply denies all Maintenace contracts. That being said, we have yet to sell a "contract" to someone who we haven't done the full installation for. Haven't tried much but we have had the opportunity and they haven't gone anywhere. Probably because it's hard to value an existing install and meet that competitive price point.
The biggest problem we run into is customers who don't give us access to their network to troubleshoot remotely, this really needs to double the cost of a Maintenace contract but good luck with that. I just make it clear that you can still have your contract but your response time is best effort.
Now if only the devices were smart enough to not keep alarming for the same errors consistently. It's certainly not like monitoring an intrusion alarm when all you have is email and uneducated devices sending notices for everything. Our service tracker will probably be more complex with all the rule routing than the systems themselves.