Sitter.com or care.com

Has anyone hired a sitter from any online website? What are your reviews on them if so? Or know a guy who knows a guy that’s used one? The good the bad, what you recommend, your experience, I want to know. We don’t have family close and i tried a daycare and he caught a bad stomach bug on his first week. He’s only 8 months will be 10 months when/if I start school again. I really want to finish my last semester of college sooner rather than later. Thank you!