Server speed and uptime are two of the primary factors that can put a company among the best or the worst web hosts. Customer service is also just as important.
ATSPACE offers free hosting with no ads to get customers to sign up and then upsell them from there. This may seem good when you first begin building your sites but as soon as you start to accumulate traffic to your site, the speed will be anything but great. The main problem though is customer support which usually blames the customer for any issues.
GoDaddy is also considered by many to be one of the worst web hosts. Meanwhile, they are an excellent domain name registrar. The main complaint users have is that support is virtually non-existent. Uptime is not a huge problem for GoDaddy, but server speed is. More recent customer feedback says they have improved but unfortunately have a terrible reputation to live down.
MochaHost is another web host to be leery of when looking for a company to use for your web hosting needs. Users say that even sales is hard to reach much less technical support. Nearly every other company at least has the resources to make the sale. They offer 180 days risk-free, but you probably have to hope to are able to reach someone if you want to take advantage of that.
1and1Hosting is also notoriously bad. Their marketing even makes it unclear what you are getting when you sign up for a plan. Their worst point though is server speed, you can expect an extremely slow website if you are hosted with 1and1.
Despite listing these companies, it is hard to say they are the worst, there are so many that there may be many many worse web hosts out there. You can’t rely on higher prices, that doesn’t always mean they are better, and you certainly can’t rely on the company’s own claims. You need to take the time to read review sites, do some of your own research, and contact the companies you are interested in directly to talk to a person before signing up.