The major concern when it comes to choosing a web host is the speed. Not the bandwidth or the disk space as you can always get more. But when it comes to server speed, or responsiveness, that is something that you cannot get with money. It's just what it is and usually gets worse by the time when the server fills up. If your host offers unlimited features with a low price, you can be sure that the servers need to be filled with a lot of customers to get profit from the server. And that means slow speeds which will never get any better.

Virtual Hosting is also known as Shared Web Hosting, where you are sharing the physical server and a single set of software applications with other users.

The disadvantage of Virtual Hosting is that you are sharing the server with other users, which are configured and controlled by an administrator, not you. So basically you have your hands tied behind your back, because you have to contact the administrator every time you have to adjust or change your configuration settings.

A Virtual Private Server is a single server that is partitioned at the root into multiple dedicated servers. This allows you to share the cost of the network connectivity, hardware, and system maintenance with other hosting customers, while maintaining your flexibility and freedom.

Moreover, there is one disadvantage with Virtual Private Servers, you need to have some program knowledge to control and configure the settings.