So many times people are sold on a product that is way above their needs. I have seen it time and time again, people that come in with little to no knowledge are taken for a ride, generally small business. I agree with many of the posts here, please do your research, what is the perfect fit for one may not be the case for the other.
Reviews are good but can also be misleading, in both directions they can be skewed by one event that triggered a lot of good/bad reviews.
A money back guarentee is good but you still want to be pretty sure who you are going with, nobody wants to go bouncing from one host to the next, moving sites along the way.
Research Research Research.... and to get an idea of response times rather than e-mailing the sales department, try the billing or tech support, that might give you a better indication of how quickly to expect a response.
Just a thought.
Thanks,
Stewart