I have been using HostGator for quite some time. Below I will review their services.
HostGator
Uptime
I have been with HostGator for going on two years now. Throughout these two years, there has been no downtime at all. Absolutely NONE. They guarantee 99.9% uptime, and seem to hold up to it well.
Support
They have, by far, the best support that I have ever, EVER, had. They have 24/7 live support, and their technicians are very nice. They are very good at what they do, and are more than willing to figure out what you are asking.
Services
They support everything really. They have cPanel and Fantastico. Also, they support mostly any web programming language. The only one they don't support is ASP.NET, but they are getting Windows servers for that.
Overall: 8/10
Reason
I like them, but I have been waiting for Windows servers for a year now.
Website:
HOSTGATOR WEB HOSTING - cPanel, Reseller, and Dedicated Website Hosting