I would recommend to STAY away from any hosting companies that offer "unlimited" bandwidth or storage as those are unreality. Most of these companies are doing heavy on overselling and will give you bad services.
Do not compromise what had been planned about for the web site just to meet the level of what can just be offered with the cheap web hosting package. Try to search for other cheap web hosting packages that offer the applications needed for the web site.
You can send an email to a potential web hosting service and judge their customer service, firsthand.
customers' safety should be the main goal for every web hosting provider. ;)
When choosing a host, I would also recommend to look at your current usage and double it at least, triple is even better because coming half way through the month and running out of bandwidth is probable the worst thing you can do for your website.
To become more web host–oriented read independent web hosting reviews that are known to be of high quality and the most up-to-date. They contain information regarding affordable web hosting firms.