In housing terms, VPS hosting is like renting your own apartment in a larger building. You're much more isolated than in the roommate situation mentioned above; it's still possible that a neighboring apartment could causes annoyance for you, but far less likely. In web hosting terms, Site A's traffic surge won't have nearly as much impact on Site B or Site C. As you'd expect, VPS hosting costs more than shared hosting. You'll pay roughly $20 to $60 per month.
Great article, Paul! Definitely one of the best reads on web hosting that I've seen. I was pleasantly surprised to see Hostinger taking the first spot. In my opinion, they fully deserve all the praise that they get. Your example with the customer support test proves that point perfectly. No hidden tricks, no downtime, no long support waits. I'm really glad I decided to give them a shot a while ago. Cheers.