I guess most of us don't want to look like a fool when asked by either a client or visitor; however, this is exactly the case when the historical uptime stats are NOT telling the truth and the whole truth.
Q: "This or that website was down Monday for quite a few hours."
A: "According to our records, there have been zero downtime in the past 12 months."
With all due respect, I honestly don't think any decent host would rely on their customers to report a down server; they should be the first to know that.
The 2 other hosting providers I mentioned offer WebSitePulse.com monitoring for free with their shared servers plans.
To have lived is not enough for them, they have to talk about it. -- Samuel Beckett